257424256 has 16 divisors (see below), whose sum is σ = 512837640. Its totient is φ = 128712064.

The previous prime is 257424241. The next prime is 257424259. The reversal of 257424256 is 652424752.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257424259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005436 + ... + 1005691.

Almost surely, 2^257424256 is an apocalyptic number.

It is an amenable number.

257424256 is a deficient number, since it is larger than the sum of its proper divisors (255413384).

257424256 is an equidigital number, since it uses as much as digits as its factorization.

257424256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011141 (or 2011129 counting only the distinct ones).

The product of its digits is 134400, while the sum is 37.

The square root of 257424256 is about 16044.4462665434. The cubic root of 257424256 is about 636.1357778753.

The spelling of 257424256 in words is "two hundred fifty-seven million, four hundred twenty-four thousand, two hundred fifty-six".