155172 has 24 divisors (see below), whose sum is σ = 369376. Its totient is φ = 50688.

The previous prime is 155171. The next prime is 155191. The reversal of 155172 is 271551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155171) 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, 708 + ... + 900.

2¹⁵⁵¹⁷² is an apocalyptic number.

155172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155172 is an abundant number, since it is smaller than the sum of its proper divisors (214204).

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

155172 is a wasteful number, since it uses less digits than its factorization.

155172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its digits is 350, while the sum is 21.

The square root of 155172 is about 393.9187733531. The cubic root of 155172 is about 53.7367156642.

The spelling of 155172 in words is "one hundred fifty-five thousand, one hundred seventy-two".