168172 has 6 divisors (see below), whose sum is σ = 294308. Its totient is φ = 84084.

The previous prime is 168151. The next prime is 168193. The reversal of 168172 is 271861.

It is an interprime number because it is at equal distance from previous prime (168151) and next prime (168193).

It is an unprimeable number.

168172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21018 + ... + 21025.

2¹⁶⁸¹⁷² is an apocalyptic number.

It is an amenable number.

168172 is a deficient number, since it is larger than the sum of its proper divisors (126136).

168172 is a wasteful number, since it uses less digits than its factorization.

168172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42047 (or 42045 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 168172 is about 410.0877954780. The cubic root of 168172 is about 55.1973078572.

The spelling of 168172 in words is "one hundred sixty-eight thousand, one hundred seventy-two".