172856 has 32 divisors (see below), whose sum is σ = 362880. Its totient is φ = 76800.

The previous prime is 172853. The next prime is 172859. The reversal of 172856 is 658271.

172856 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (172853) and next prime (172859).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4196 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2¹⁷²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

172856 is an abundant number, since it is smaller than the sum of its proper divisors (190024).

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

172856 is a wasteful number, since it uses less digits than its factorization.

172856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 91 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 172856 is about 415.7595458916. The cubic root of 172856 is about 55.7050822279.

The spelling of 172856 in words is "one hundred seventy-two thousand, eight hundred fifty-six".