170256 has 20 divisors (see below), whose sum is σ = 439952. Its totient is φ = 56736.

The previous prime is 170249. The next prime is 170263. The reversal of 170256 is 652071.

It is an interprime number because it is at equal distance from previous prime (170249) and next prime (170263).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 170256.

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, 1726 + ... + 1821.

2¹⁷⁰²⁵⁶ is an apocalyptic number.

170256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

170256 is an abundant number, since it is smaller than the sum of its proper divisors (269696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

170256 is a wasteful number, since it uses less digits than its factorization.

170256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 170256 is about 412.6208913761. The cubic root of 170256 is about 55.4243755333.

The spelling of 170256 in words is "one hundred seventy thousand, two hundred fifty-six".