1251323904 has 52 divisors (see below), whose sum is σ = 3336489176. Its totient is φ = 417103872.

The previous prime is 1251323893. The next prime is 1251323923. The reversal of 1251323904 is 4093231521.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38629 + ... + 63204.

Almost surely, 2^1251323904 is an apocalyptic number.

It is an amenable number.

1251323904 is an abundant number, since it is smaller than the sum of its proper divisors (2085165272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251323904 is an equidigital number, since it uses as much as digits as its factorization.

1251323904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101860 (or 101838 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1251323904 is about 35374.0569344258. The cubic root of 1251323904 is about 1077.5975127932.

The spelling of 1251323904 in words is "one billion, two hundred fifty-one million, three hundred twenty-three thousand, nine hundred four".