257038 has 4 divisors (see below), whose sum is σ = 385560. Its totient is φ = 128518.

The previous prime is 257017. The next prime is 257053. The reversal of 257038 is 830752.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

257038 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64258 + ... + 64261.

It is an arithmetic number, because the mean of its divisors is an integer number (96390).

257038 is a Friedman number, since it can be written as 507^2-8-3, using all its digits and the basic arithmetic operations.

2²⁵⁷⁰³⁸ is an apocalyptic number.

257038 is a deficient number, since it is larger than the sum of its proper divisors (128522).

257038 is a wasteful number, since it uses less digits than its factorization.

257038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128521.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 257038 is about 506.9891517577. The cubic root of 257038 is about 63.5817452191.

The spelling of 257038 in words is "two hundred fifty-seven thousand, thirty-eight".