172125915 has 16 divisors (see below), whose sum is σ = 296586528. Its totient is φ = 84738816.

The previous prime is 172125907. The next prime is 172125923. The reversal of 172125915 is 519521271.

It is an interprime number because it is at equal distance from previous prime (172125907) and next prime (172125923).

It is not a de Polignac number, because 172125915 - 2³ = 172125907 is a prime.

It is a super-2 number, since 2×172125915² = 59254661229174450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441154 + ... + 441543.

It is an arithmetic number, because the mean of its divisors is an integer number (18536658).

Almost surely, 2^172125915 is an apocalyptic number.

172125915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172125915 is a deficient number, since it is larger than the sum of its proper divisors (124460613).

172125915 is a wasteful number, since it uses less digits than its factorization.

172125915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882718.

The product of its digits is 6300, while the sum is 33.

The square root of 172125915 is about 13119.6766347346. The cubic root of 172125915 is about 556.2654510710.

The spelling of 172125915 in words is "one hundred seventy-two million, one hundred twenty-five thousand, nine hundred fifteen".