172140171 has 16 divisors (see below), whose sum is σ = 276115200. Its totient is φ = 93188448.

The previous prime is 172140161. The next prime is 172140187. The reversal of 172140171 is 171041271.

It is not a de Polignac number, because 172140171 - 2¹¹ = 172138123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172140161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215316 + ... + 216113.

It is an arithmetic number, because the mean of its divisors is an integer number (17257200).

Almost surely, 2^172140171 is an apocalyptic number.

172140171 is a deficient number, since it is larger than the sum of its proper divisors (103975029).

172140171 is a wasteful number, since it uses less digits than its factorization.

172140171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431458.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 172140171 is about 13120.2199295591. The cubic root of 172140171 is about 556.2808078548.

The spelling of 172140171 in words is "one hundred seventy-two million, one hundred forty thousand, one hundred seventy-one".