57865257 has 12 divisors (see below), whose sum is σ = 83815680. Its totient is φ = 38469528.

The previous prime is 57865211. The next prime is 57865261. The reversal of 57865257 is 75256875.

It is not a de Polignac number, because 57865257 - 2⁸ = 57865001 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (57865267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5457 + ... + 12062.

It is an arithmetic number, because the mean of its divisors is an integer number (6984640).

Almost surely, 2^57865257 is an apocalyptic number.

It is an amenable number.

57865257 is a deficient number, since it is larger than the sum of its proper divisors (25950423).

57865257 is a wasteful number, since it uses less digits than its factorization.

57865257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17892 (or 17889 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 57865257 is about 7606.9216507073. The cubic root of 57865257 is about 386.7876767340.

The spelling of 57865257 in words is "fifty-seven million, eight hundred sixty-five thousand, two hundred fifty-seven".