172538120 has 32 divisors (see below), whose sum is σ = 389479320. Its totient is φ = 68789760.

The previous prime is 172538101. The next prime is 172538123. The reversal of 172538120 is 21835271.

172538120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 87123556 + 85414564 = 9334^2 + 9242^2 .

It is not an unprimeable number, because it can be changed into a prime (172538123) 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, 5630 + ... + 19410.

Almost surely, 2^172538120 is an apocalyptic number.

172538120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172538120 is an abundant number, since it is smaller than the sum of its proper divisors (216941200).

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

172538120 is a wasteful number, since it uses less digits than its factorization.

172538120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105 (or 14101 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 172538120 is about 13135.3766599972. The cubic root of 172538120 is about 556.7091429375.

The spelling of 172538120 in words is "one hundred seventy-two million, five hundred thirty-eight thousand, one hundred twenty".