1 is the Hindu-Arabic numeral for the number one (the unit). Explore the curious properties of number 1, an odd number which is uniquely neither prime nor composite. It is the smallest positive integer, and smallest natural number. : the number denoting unity. Includes mathematical info, prime factorization, divisors, bases and much more! Dec 22, 2025 · Although the number 1 used to be considered a prime number, it requires special treatment in so many definitions and applications involving primes greater than or equal to 2 that it is usually placed into a class of its own (Wells 1986, p. The author and the main character are one and the same. Discover what the number 1 means with fun examples. 31). : a one-dollar bill. 1 is the multiplicative identity, i.

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