257156 has 12 divisors (see below), whose sum is σ = 458892. Its totient is φ = 126048.

The previous prime is 257141. The next prime is 257161. The reversal of 257156 is 651752.

257156 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 84100 + 173056 = 290^2 + 416^2 .

It is a super-2 number, since 2×257156² = 132258416672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (38241).

2²⁵⁷¹⁵⁶ is an apocalyptic number.

It is an amenable number.

257156 is a deficient number, since it is larger than the sum of its proper divisors (201736).

257156 is a wasteful number, since it uses less digits than its factorization.

257156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1268 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 257156 is about 507.1055117034. The cubic root of 257156 is about 63.5914733503.

It can be divided in two parts, 25715 and 6, that multiplied together give a triangular number (154290 = T₅₅₅).

The spelling of 257156 in words is "two hundred fifty-seven thousand, one hundred fifty-six".