172725520 has 40 divisors (see below), whose sum is σ = 438096960. Its totient is φ = 62808960.

The previous prime is 172725493. The next prime is 172725533. The reversal of 172725520 is 25527271.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97260 + ... + 99019.

It is an arithmetic number, because the mean of its divisors is an integer number (10952424).

Almost surely, 2^172725520 is an apocalyptic number.

172725520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172725520 is an abundant number, since it is smaller than the sum of its proper divisors (265371440).

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

172725520 is a wasteful number, since it uses less digits than its factorization.

172725520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196303 (or 196297 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 172725520 is about 13142.5081320119. The cubic root of 172725520 is about 556.9106241037.

The spelling of 172725520 in words is "one hundred seventy-two million, seven hundred twenty-five thousand, five hundred twenty".