157172 has 6 divisors (see below), whose sum is σ = 275058.
Its totient is φ = 78584.
The previous prime is 157163. The next prime is 157177. The reversal of 157172 is 271751.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 155236 + 1936 = 394^2 + 44^2
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (157177) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19643 + ... + 19650.
It is an arithmetic number, because the mean of its divisors is an integer number (45843).
2157172 is an apocalyptic number.
It is an amenable number.
157172 is a deficient number, since it is larger than the sum of its proper divisors (117886).
157172 is a wasteful number, since it uses less digits than its factorization.
157172 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 39297 (or 39295 counting only the distinct ones).
The product of its digits is 490, while the sum is 23.
The square root of 157172 is about 396.4492401304.
The cubic root of 157172 is about 53.9666002880.
The spelling of 157172 in words is "one hundred fifty-seven thousand, one hundred seventy-two".