172158 has 16 divisors (see below), whose sum is σ = 393600. Its totient is φ = 49176.

The previous prime is 172157. The next prime is 172169. The reversal of 172158 is 851271.

172158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 172158.

It is not an unprimeable number, because it can be changed into a prime (172153) 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, 2008 + ... + 2091.

It is an arithmetic number, because the mean of its divisors is an integer number (24600).

2¹⁷²¹⁵⁸ is an apocalyptic number.

172158 is an abundant number, since it is smaller than the sum of its proper divisors (221442).

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

172158 is a wasteful number, since it uses less digits than its factorization.

172158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111.

The product of its digits is 560, while the sum is 24.

The square root of 172158 is about 414.9192692561. The cubic root of 172158 is about 55.6300012336.

The spelling of 172158 in words is "one hundred seventy-two thousand, one hundred fifty-eight".