257887 has 12 divisors (see below), whose sum is σ = 316920. Its totient is φ = 208656.

The previous prime is 257879. The next prime is 257893. The reversal of 257887 is 788752.

It is not a de Polignac number, because 257887 - 2³ = 257879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257837) 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, 793 + ... + 1069.

It is an arithmetic number, because the mean of its divisors is an integer number (26410).

2²⁵⁷⁸⁸⁷ is an apocalyptic number.

257887 is a deficient number, since it is larger than the sum of its proper divisors (59033).

257887 is a wasteful number, since it uses less digits than its factorization.

257887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 303 counting only the distinct ones).

The product of its digits is 31360, while the sum is 37.

The square root of 257887 is about 507.8257575192. The cubic root of 257887 is about 63.6516720747.

The spelling of 257887 in words is "two hundred fifty-seven thousand, eight hundred eighty-seven".