1251525928 has 16 divisors (see below), whose sum is σ = 2368543680. Its totient is φ = 619914288.

The previous prime is 1251525871. The next prime is 1251525937. The reversal of 1251525928 is 8295251521.

It is a super-2 number, since 2×1251525928² = 3132634296912522368, which contains 22 as substring.

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, 730176 + ... + 731887.

It is an arithmetic number, because the mean of its divisors is an integer number (148033980).

Almost surely, 2^1251525928 is an apocalyptic number.

It is an amenable number.

1251525928 is a deficient number, since it is larger than the sum of its proper divisors (1117017752).

1251525928 is a wasteful number, since it uses less digits than its factorization.

1251525928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462176 (or 1462172 counting only the distinct ones).

The product of its digits is 72000, while the sum is 40.

The square root of 1251525928 is about 35376.9123582033. The cubic root of 1251525928 is about 1077.6555017345.

The spelling of 1251525928 in words is "one billion, two hundred fifty-one million, five hundred twenty-five thousand, nine hundred twenty-eight".