257495 has 12 divisors (see below), whose sum is σ = 359784. Its totient is φ = 176400.

The previous prime is 257489. The next prime is 257497. The reversal of 257495 is 594752.

257495 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 257495 - 2⁸ = 257239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257497) 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, 281 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (29982).

2²⁵⁷⁴⁹⁵ is an apocalyptic number.

257495 is a deficient number, since it is larger than the sum of its proper divisors (102289).

257495 is a wasteful number, since it uses less digits than its factorization.

257495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1063 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 257495 is about 507.4396515843. The cubic root of 257495 is about 63.6194045717.

The spelling of 257495 in words is "two hundred fifty-seven thousand, four hundred ninety-five".