21174

21174 is a positive integer that lies between 21173 and 21175. In number theory, it is an even composite number. Its prime factorization is 2 × 3 × 3529, with 3529 prime. Consequently, its divisors are 1, 2, 3, 6, 3529, 7058, 10587, and 21174.

The sum of its decimal digits is 15, making the number divisible by 3 but not by 9; its digital root is 6. It is not a perfect square or cube. Because it has a prime factor congruent to 3 mod 4 (namely 3) with odd exponent, 21174 cannot be expressed as a sum of two squares.

Representations in common bases: in binary it is 101001010110110; in hexadecimal, 0x52B6; in octal, 51266.

As a relatively small integer, 21174 serves as a typical example in discussions of prime factorization, divisor counting (it has exactly eight divisors), and base representations. Its factorization demonstrates how a number can be even and composite while containing a larger prime factor, illustrating properties relevant to topics such as modular arithmetic and the sum-of-two-squares criterion.

See also: list of integers, prime factorization, base representations.