172112361 has 16 divisors (see below), whose sum is σ = 237806400. Its totient is φ = 110593728.

The previous prime is 172112351. The next prime is 172112363. The reversal of 172112361 is 163211271.

It is not a de Polignac number, because 172112361 - 2⁵ = 172112329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172112363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62955 + ... + 65631.

It is an arithmetic number, because the mean of its divisors is an integer number (14862900).

Almost surely, 2^172112361 is an apocalyptic number.

It is an amenable number.

172112361 is a deficient number, since it is larger than the sum of its proper divisors (65694039).

172112361 is a wasteful number, since it uses less digits than its factorization.

172112361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448.

The product of its digits is 504, while the sum is 24.

The square root of 172112361 is about 13119.1600721997. The cubic root of 172112361 is about 556.2508497062.

The spelling of 172112361 in words is "one hundred seventy-two million, one hundred twelve thousand, three hundred sixty-one".