257042775 has 24 divisors (see below), whose sum is σ = 463613184. Its totient is φ = 124626400.

The previous prime is 257042767. The next prime is 257042789. The reversal of 257042775 is 577240752.

It is not a de Polignac number, because 257042775 - 2³ = 257042767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154959 + ... + 156608.

It is an arithmetic number, because the mean of its divisors is an integer number (19317216).

Almost surely, 2^257042775 is an apocalyptic number.

257042775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

257042775 is a deficient number, since it is larger than the sum of its proper divisors (206570409).

257042775 is a wasteful number, since it uses less digits than its factorization.

257042775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311591 (or 311586 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 39.

The square root of 257042775 is about 16032.5536019687. The cubic root of 257042775 is about 635.8213893645.

The spelling of 257042775 in words is "two hundred fifty-seven million, forty-two thousand, seven hundred seventy-five".