In mathematics, the number four is an even number and the smallest composite number. Four is also the second square number after one. A small minority of people have four fingers on each hand and four toes on each foot. [source?] Four squared is 16, and four doubled is 8. The number 4 can be linked to numerology, superstition, important dates and so much more. Here are 10 facts about the number 4 that you should know. In internet slang, 4 can replace the word for (as four and for are pronounced similarly). For example, messaging 4 u instead of for you when talking to someone. The number four is a fundamental concept, representing one more than three and the fourth in a series. Culturally, it is associated with order in the universe, seen in the four elements (earth, air, fire, water), four seasons, four compass points, and four lunar phases. In Buddhism, the Four Noble Truths are central, and to the Pythagoreans, 4 was the source of the perfect number 10. The Sioux. Four is the second square number (a square number is an integer that can be written as the square of some other integer) and the second centered triangular number. Explore fascinating facts about the number 4. Discover its significance in various cultures, including its symbolism and representations in numerology, astrology, and mythology. 4 (four) is the natural number that follows 3 and precedes 5. It is the first and smallest composite number. 4 is the first composite number, divisible by 1, 2, and 4. It is the first number whose divisors are all powers of 2. Its prime factorization is 22. 4=2+2 4=2×2 4=2 Hyperoperations: 2↑↑2=4, 2↑↑↑2=4 Lagrange's four-square theorem states that every positive integer can be. See the number 4 with objects that sometimes come to life for a fun surprise! This early math video works great as a Number of the Day lesson or as an exciting early math activity for preschool. Significance, symbolism and meaning of number 4. Number 4 symbolism. Fun facts about number 4 as a lucky number and an unlucky number. Claudia Winkleman hosts the search for the UK's best amateur pianists. Sail off into tropical waters for the latest series of Below Deck.