257696 has 12 divisors (see below), whose sum is σ = 507402. Its totient is φ = 128832.

The previous prime is 257689. The next prime is 257707. The reversal of 257696 is 696752.

It can be written as a sum of positive squares in only one way, i.e., 190096 + 67600 = 436^2 + 260^2 .

It is a plaindrome in base 11.

It is an unprimeable number.

257696 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, 3995 + ... + 4058.

2²⁵⁷⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

257696 is a deficient number, since it is larger than the sum of its proper divisors (249706).

257696 is an equidigital number, since it uses as much as digits as its factorization.

257696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8063 (or 8055 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 257696 is about 507.6376660572. The cubic root of 257696 is about 63.6359539862.

The spelling of 257696 in words is "two hundred fifty-seven thousand, six hundred ninety-six".