172160001 has 24 divisors (see below), whose sum is σ = 275049320. Its totient is φ = 103078656.

The previous prime is 172159993. The next prime is 172160033. The reversal of 172160001 is 100061271.

It can be written as a sum of positive squares in 4 ways, for example, as 8294400 + 163865601 = 2880^2 + 12801^2 .

It is not a de Polignac number, because 172160001 - 2³ = 172159993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172160041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15556 + ... + 24213.

Almost surely, 2^172160001 is an apocalyptic number.

It is an amenable number.

172160001 is a deficient number, since it is larger than the sum of its proper divisors (102889319).

172160001 is a wasteful number, since it uses less digits than its factorization.

172160001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39825 (or 39822 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 172160001 is about 13120.9756115923. The cubic root of 172160001 is about 556.3021676276.

The spelling of 172160001 in words is "one hundred seventy-two million, one hundred sixty thousand, one".