257565972 has 12 divisors (see below), whose sum is σ = 600987296. Its totient is φ = 85855320.

The previous prime is 257565967. The next prime is 257565989. The reversal of 257565972 is 279565752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10731904 + ... + 10731927.

Almost surely, 2^257565972 is an apocalyptic number.

It is an amenable number.

257565972 is an abundant number, since it is smaller than the sum of its proper divisors (343421324).

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

257565972 is a wasteful number, since it uses less digits than its factorization.

257565972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21463838 (or 21463836 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 48.

The square root of 257565972 is about 16048.8620157318. The cubic root of 257565972 is about 636.2524906270.

The spelling of 257565972 in words is "two hundred fifty-seven million, five hundred sixty-five thousand, nine hundred seventy-two".