257042536 has 16 divisors (see below), whose sum is σ = 483007140. Its totient is φ = 128240640.

The previous prime is 257042509. The next prime is 257042579. The reversal of 257042536 is 635240752.

It can be written as a sum of positive squares in 2 ways, for example, as 235008900 + 22033636 = 15330^2 + 4694^2 .

It is a super-2 number, since 2×257042536² = 132141730626622592, 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, 31161 + ... + 38536.

Almost surely, 2^257042536 is an apocalyptic number.

It is an amenable number.

257042536 is a deficient number, since it is larger than the sum of its proper divisors (225964604).

257042536 is a wasteful number, since it uses less digits than its factorization.

257042536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70164 (or 70160 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 257042536 is about 16032.5461483820. The cubic root of 257042536 is about 635.8211923008.

The spelling of 257042536 in words is "two hundred fifty-seven million, forty-two thousand, five hundred thirty-six".