# The most interesting numbers.

Many numbers have an interesting story behind. Considering numerology, prime, integer, natural, Roman, perfect, happy, Friedman, Fibonacci, palindromic numbers etc. it is difficult to find a number that is not interesting.

## The most interesting numbers.

There are many scientific and historical curiosities about numbers. We look for what is interesting in each number, not only from a purely arithmetic point of view, but from a cultural, philosophical or metaphysical point of view. If you know anything interesting about any integer, please write us . Let's see some examples:
1 , 4 , 7 , 11 , 12 , 13 , 40 , 64 , 300 , 666 , 1100 , 1260 , 1729 , 4624 , 4805 , 6174 , 18875 , 125460 , 242495 , 2130800 , 9814072356

THE NUMBER ONE (1)
• It is a happy number .
• It is the number of monism and monotheism, one God, the beginning of all things, the One of Parmenides, the monologue.
• The number 1 is used throughout the Bible to indicate God Himself.
• Hydrogen is the chemical element of atomic number 1 represented by the symbol H.
• In numerology it is the sign of individualistic and aggressive nature. Represents the Archetype of the Father ( more information here ).
• On 07/28/1976 the ČSA plane, flight number 001, Ilyushin Il-18B, crashed in Bratislava, Slovakia; 70 passengers and 6 crew members died.
• It is the telephone prefix to call the United States and Canada.
• There is 1 km distance (straight line) between Sendai (Japan) and Sendai-shi (Japan).
• The decimal (Arabic) number 1 converted to Roman numeral is I.
• It is one of the Fibonacci numbers .
• 1 multiplied by any number gives that number.
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THE NUMBER FOUR (4)
• In hospitals in Japan it is avoided to use the number 4 as a room number because its pronunciation "shi" is the same as the word "death".
• Fingernails grow 4 times faster than toenails.
• There are four cardinal points (north, south, east, west).
• On 05/26/1991, the Lauda Air plane, flight number 004, Boeing 767-3Z9ER, crashed in Phu Toei National Park, Thailand, killing 213 passengers and 10 crew members.
• 4 is the first composite number.
• It is the number of pluralism, the paganism of many gods begins here, the Tetragrammaton.
• Represents universal truth.
• There is a 4 km distance (straight line) between Hāora (India) and Calcutta (India).
• There are 4 great prophets, Isaiah, Jeremiah, Ezekiel and Daniel.
• There are 4 horsemen of the Apocalypse.
• There are 4 Angels ready in the 4 corners of the Earth.
• Beryllium is the chemical element of atomic number 4 represented by the symbol Be.
• The decimal (Arabic) number 4 converted to Roman numeral is IV.
• In numerology it is the sign of practicality, loyalty, rigidity and repression. It is also the symbol of creation, of fighting against limits, of scientific mentality, attention to detail, … more information here
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THE NUMBER SEVEN (7)
• It is a happy number .
• It is a prime number .
• In China there are seven cardinal points (with the center, up and down).
• There are 7 musical notes.
• Number 7 is the telephone prefix to call the Russian Federation.
• A week has 7 days.
• It is estimated that globally in the world there is always at least 7% of the population that is drunk.
• Nitrogen is the chemical element of atomic number 7 represented by the symbol N.
• In the Bible there are Seven Sacraments and the seven gifts of the Holy Spirit. Noah carried the cleaned animals into the Ark in sets of 7 pairs for each species.
• There are 7 deadly sins.
• The Bible uses 7 to indicate perfection, and it is the sign of God, divine worship, terminations, obedience and rest. The number seven is used 562 times in the Bible, including its derivatives (e.g. seventh, sevens).
• The number seven is also the most common in biblical prophecy, occurring 42 times in Daniel and Revelation. In the Apocalypse there are seven churches, seven spirits, seven golden candlesticks, seven stars, seven lamps, seven seals, seven horns, seven eyes, seven angels, seven trumpets, seven thunders, seven thousand killed in a great earthquake, seven heads , seven crowns, seven last plagues, seven golden bowls, seven mountains and seven kings.
• On 09/01/1983, the Korean Air Lines plane, flight number 007, Boeing 747-230B, crashed in the Sea of ​​Japan, near Moneron Island, Soviet Union; 246 passengers and 23 crew members died.
• There is 7 km distance (straight line) between Neza (United Mexican States) and Iztapalapa (United Mexican States).
• In numerology it is the sign of thought, spirituality, consciousness, psychic analysis, wisdom, ... ( more information here ).
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THE NUMBER ELEVEN (11)
• The attacks of March 11, 2004, known by the number 11M, were a series of terrorist attacks on four trains of the Madrid Cercanías network.
• The attacks of September 11, 2001 (commonly referred to as 9/11 or 9/11) were a series of suicide terrorist attacks committed that day in the United States.
• On 09/11/2001 the American Airlines plane, flight number 11, Boeing 767-223ER, crashed in New York City, USA; 81 passengers and 11 crew members died.
• On 11/27/1983 the Avianca plane, flight number 011, Boeing 747-283B, crashed in Madrid, Spain; 162 passengers and 19 crew members died.
• September 11 is the National Day of Catalonia or Diada.
• Sodium is the chemical element of atomic number 11 represented by the symbol Na.
• New spiritual trends claim that 11:11 on a clock refers to the signs of protectors or spirit guides.
• It is 11 km (straight line) between Manhattan (USA) and The Bronx (USA).
• The decimal (Arabic) number 11 converted to Roman numeral is XI.
• It is palindromic number .
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THE NUMBER TWELVE (12)
• There are 12 gates to Paradise.
• There are 12 signs of the Zodiac.
• The duodenum (derived from the Latin word "duodecim", meaning "twelve") is part of the small intestine and in an adult it measures approximately 12 inches in length (30.5 cm).
• A foot (naturally occurring unit of length) is 12 inches.
• The human body has 12 cranial nerves.
• The secret number of Gaudí's Sagrada Familia temple is 12. All the proportions of the construction elements involve the divisors of 12, a figure that allows a very rich factoring and its division into halves and thirds.
• For the Greeks, there were 12 Olympian gods of the Pantheon, as well as a dozen works commissioned to the mythical Roman hero Hercules as penance.
• According to the Bible, Jacob had 12 sons, and in this same book it is mentioned that there were 12 tribes of Israel and 12 apostles.
• New Jerusalem, the city of heaven, is described as having thick walls, symbolic of the 12 tribes and the 12 Apostles.
• Represents the Church and the authority of God in the Bible.
• The tree of life has 12 different types of fruits.
• Magnesium is the chemical element of atomic number 12 represented by the symbol Mg.
• The American writer F. Emerson Andrews founded The Duodecimal Society on April 5, 1944 with the aim of researching and educating "in mathematical science, with special dedication to the use of Base Twelve of numbering, in mathematics, weights and measures ".
• A year has 12 months.
• Pokémon Butterfree (Batafurī) is a Pokémon number # 012 of the National Pokédex. Butterfree is a bug and flying Pokémon in the first generation. It is a Pokémon from the Bug Egg group. Butterfree's other indexes are Kalos Centro index 025 - Central Zone Pokédex, Johto index 026.
• There is 12 km (straight line) between Pimpri (India) and Pune (India).
• It is the smallest number with six divisors: 1, 2, 3, 4, 6 and 12. Thus, the number 12 and its multiples are the only ones that have at the same time exactly half, third, fourth, two thirds and three quarters.
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THE NUMBER THIRTEEN (13)
• For Spain and Latin America, Tuesday the 13th is bad luck. For France and English-speaking countries it is Friday the 13th.
• The number 13 in Japan is considered bad for a purely mathematical reason, since it is the sum of 9 and 4.
• On average a person laughs 13 times in a day.
• Aluminum is the chemical element of atomic number 13 represented by the symbol Al.
• There is a distance of 13 km (straight line) between Gustavo A. Madero (United Mexican States) and Naucalpan de Juárez (United Mexican States).
• The decimal (Arabic) number 13 converted to Roman numeral is XIII.
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THE NUMBER FORTY (40)
• There are many references to "40 days and 40 nights" throughout the Bible. The most notable are the 40 days and nights of rain that caused Noah's flood.
• Represents a generation, and times of trial in the Bible. He rained for 40 days during the Flood. Moses spent 40 years in the desert, as did the children of Israel.
• Jesus remained on earth for 40 days after his resurrection, appearing to the apostles and teaching them, before ascending to heaven.
• Jesus fasted for 40 days in the desert before being tempted by Satan.
• It is the traditional Hebrew number for the duration of a trial of some kind, when times are tough and a person's faith is tested.
• The Bible uses 40 to denote completion.
• Number 40 is the phone code to call Romania.
• Zirconium is the chemical element of atomic number 40 represented by the symbol Zr.
• On 07/20/1981 the Somali Airlines plane, flight number 40, Fokker F27 Friendship 600, crashed in Bal'ad District, Somalia; 44 passengers and 6 crew members died.
• There is a 40 km distance (straight line) between Jieyang (China) and Shantou (China).
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THE NUMBER SIXTY-FOUR (64)
• The oracular book "I Ching", has 64 hexagrams.
• The chessboard has 64 squares or squares.
• Number 64 is the phone code to call New Zealand.
• There is a 64 km distance (straight line) between Xinxiang (China) and Zhengzhou (China).
• Gadolinium is the chemical element of atomic number 64 represented by the symbol Gd.
• Pokémon Kadabra (Yungerā, Yungerer) is a pokémon number # 064 of the National Pokédex. Kadabra is a psychic type Pokémon in the first generation. It is a Humanoid egg group Pokémon. The other Kadabra indexes are Kalos Centro index 103 - Central Zone Pokédex, Sinnoh index 021, Johto index 090, Hoenn index 040.
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THE NUMBER THREE HUNDRED (300)
• Nerve impulses travel at 300 km / hour.
• Babies have 300 bones.
• The total area of ​​the Maldives is 300 km².
• There are 300 km of distance (straight line) between Bogotá (Colombia) and Santiago de Cali (Colombia).
• Pokémon Skitty (Eneko, Eneco) is a pokémon number # 300 of the National Pokédex. Skitty is a normal type Pokémon in the third generation. It is a Field and Fairy egg group Pokémon. Skitty's other indexes are Hoenn index 061, Unova index 078, Kalos Centro index 078 - Central Zone Pokédex.
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THE NUMBER SIX HUNDRED SIXTY-SIX (666)
• Called Sorath or Surt - according to the Apocalypse it is the number that the Antichrist has engraved on some part of his body. The Apocalypse also says that the name of the Antichrist is made up of letters that, added to their numerical value, give the fateful result of 666.
• Represents the kingdom of man in opposition to God in the Bible.
• The number 666 symbolizes the False Trinity in the Bible.
• 666 is the number of the beast . It is obtained by gematria (assigning numerical value to letters) when applied to the written bible. This number generates a phobia that has its own name, hexakosioihexekontahexaphobia, which is sometimes abbreviated as trihexaphobia.
• US 666 is the "Devil's Highway" in the American Southwest and is considered unlucky.
• 666 is related to the golden number by a simple trigonometric formula. If Phi is the golden number , then sen (666) = cos (6 · 6 · 6) = -phi / 2
• 666 is one of the 6 numbers that is equal to the sum of its digits plus the sum of the cubes of its digits: 666 = 6 + 6 + 6 + 6³ + 6³ + 6³.
• 666 is part of the Pythagorean trio 216, 230, 666 which in fact can only be written using 6 as a base: 666² = (6 · 6 · 6) ² + (666 - 6 · 6) ²
• 666 is the sum of the squares of the first 7 prime numbers. 666 = 2² + 3² + 5² + 7² + 11² + 13² + 17²
• The total area of ​​Selayar Island in the Selayar Islands is 666 km² and it is the 413th largest island in the world.
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THE NUMBER ONE THOUSAND HUNDRED (1100)
• Nokia 1100 was launched in 2003 and broke a record in units sold reaching 250 million. It was one of the 10 best-selling Nokia models in cell phone history.
• There is a distance of 1,100 km (straight line) between Riga (Latvia) and Vienna (Austria).
• The decimal (Arabic) number 1100 converted to Roman numeral is MC.
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THE NUMBER ONE THOUSAND TWO HUNDRED SIXTY (1260)
• The number 1260 is the vampire number because 1260 = 21 x 60. A vampire number is a natural number, with an even number of digits, equal to the product of two natural numbers, each with half as many digits as the original, containing, between them, all the digits of the initial number and not both ending in zero.
• There is 1,260 km distance (straight line) between Cape (South Africa) and Johannesburg (South Africa).
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THE NUMBER ONE THOUSAND SEVEN HUNDRED TWENTY-NINE (1729)
• 1729 is the so-called Hardy-Ramanujan number is the smallest natural number that can be expressed as the sum of two positive cubes in two different ways. 1729 = 13 + 123 = 93 + 103.
• There is a distance of 1,729 km (straight line) between Bucheon-si (South Korea) and Tainan (Taiwan).
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THE NUMBER FOUR THOUSAND SIX HUNDRED TWENTY-FOUR (4624)
• 4624 is the narcist number . According to Greek mythology, Narcissus was such a beautiful and proud young man that he fell in love with his own image reflected in a fountain and drowned in it. Narcissistic numbers are those that can be obtained by mathematical manipulation of the digits that compose it. They are reflected on one side and the other of equality. 4624 = 44 + 46 + 42 + 44.
• There is a distance of 4,624 km (straight line) between Singapore (Singapore) and Ulsan (South Korea).
• There is a 4,624 km distance (straight line) between Rome (Italy) and Tashkent (Uzbekistan).
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THE NUMBER FOUR THOUSAND EIGHT HUNDRED FIVE (4805)
• Jiaze (Tibet) is the 767th highest mountain in the world with a height of 4805 meters.
• Cerro Cóndorhuachanan (Peru) is the 767th highest mountain in the world with a height of 4805 meters.
• Cerro Cachapata (Peru) is the 767th highest mountain in the world with a height of 4805 meters.
• Cerro Pariguanas (Peru) is the 767th highest mountain in the world with a height of 4805 meters.
• Cerro Rumipunta (Peru) is the 767th highest mountain in the world with a height of 4805 meters.
• Cerro Suquihua (Peru) is the 767th highest mountain in the world with a height of 4805 meters.
• Morro León Huactanan (Peru) is the 767th highest mountain in the world with a height of 4805 meters.
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THE NUMBER SIX THOUSAND ONE HUNDRED AND SEVENTY FOUR (6174)
• The number 6174 is called Kaprekar's constant for 4-digit numbers.
• There is 6,174 km of distance (straight line) between Agra (India) and Hamburg (Germany).
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THE NUMBER EIGHTEEN THOUSAND EIGHT HUNDRED AND SEVENTY FIVE (18875)
• In 1869 the winning number of the Christmas lottery draw in Spain was 18875.
• The decimal (Arabic) number 18875 converted to Roman numeral is (IV) MMDCCCLXXV.
• There is a distance of 18,875 km (straight line) between Cebu City (Philippines) and Santa Cruz de la Sierra (Bolivia).
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THE NUMBER ONE HUNDRED TWENTY-FIVE THOUSAND FOUR HUNDRED SIXTY (125460)
• It is the vampire number , because 125460 = 204 x 615 and, also, 125460 = 246 x 510. A vampire number is a natural number, with an even number of digits, equal to the product of two natural numbers, each with half the digits of the original, containing, between them, all the digits of the initial number and not both ending in zero.
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THE NUMBER TWO HUNDRED FORTY-TWO THOUSAND FOUR HUNDRED NINETY-FIVE (242495)
• The total area of ​​the United Kingdom is 242,495 km² of which 1,680 km² is water, 241,930 km² of land.
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THE NUMBER TWO MILLION ONE HUNDRED THIRTY THOUSAND EIGHT HUNDRED (2130800)
• The total area of ​​the Island of Greenland in (Denmark) is 2,130,800 km² and is the 1st largest island in the world.
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THE NUMBER NINE THOUSAND EIGHT HUNDRED FOURTEEN MILLION SEVENTY-TWO THOUSAND THREE HUNDRED FIFTY-SIX (9814072356)
• The number 9,814,072,356 is the largest holodigital square there is , that is, the largest squared number that contains all the decimal digits exactly once.
• The decimal number (Arabic) 9814072356 converted to Roman numeral is ((DCXIII)) (MDXVIII) CCCLVI.
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Read more: Big Numbers , Evil Numbers.