172165 has 8 divisors (see below), whose sum is σ = 236160. Its totient is φ = 118032.

The previous prime is 172157. The next prime is 172169. The reversal of 172165 is 561271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172165 - 2³ = 172157 is a prime.

172165 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172169) 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, 2425 + ... + 2494.

It is an arithmetic number, because the mean of its divisors is an integer number (29520).

2¹⁷²¹⁶⁵ is an apocalyptic number.

It is an amenable number.

172165 is a deficient number, since it is larger than the sum of its proper divisors (63995).

172165 is an equidigital number, since it uses as much as digits as its factorization.

172165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4931.

The product of its digits is 420, while the sum is 22.

The square root of 172165 is about 414.9277045462. The cubic root of 172165 is about 55.6307552013.

The spelling of 172165 in words is "one hundred seventy-two thousand, one hundred sixty-five".