257745056 has 12 divisors (see below), whose sum is σ = 507435642. Its totient is φ = 128872512.

The previous prime is 257745029. The next prime is 257745077. The reversal of 257745056 is 650547752.

It can be written as a sum of positive squares in only one way, i.e., 130416400 + 127328656 = 11420^2 + 11284^2 .

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 as a sum of consecutive naturals, namely, 4027235 + ... + 4027298.

Almost surely, 2^257745056 is an apocalyptic number.

It is an amenable number.

257745056 is a deficient number, since it is larger than the sum of its proper divisors (249690586).

257745056 is an equidigital number, since it uses as much as digits as its factorization.

257745056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054543 (or 8054535 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 41.

The square root of 257745056 is about 16054.4403826480. The cubic root of 257745056 is about 636.3999172487.

The spelling of 257745056 in words is "two hundred fifty-seven million, seven hundred forty-five thousand, fifty-six".