172285139 has 8 divisors (see below), whose sum is σ = 189039312. Its totient is φ = 156031200.

The previous prime is 172285129. The next prime is 172285147. The reversal of 172285139 is 931582271.

172285139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172285139 - 2²⁴ = 155507923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172285109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124337 + ... + 125714.

It is an arithmetic number, because the mean of its divisors is an integer number (23629914).

Almost surely, 2^172285139 is an apocalyptic number.

172285139 is a deficient number, since it is larger than the sum of its proper divisors (16754173).

172285139 is a wasteful number, since it uses less digits than its factorization.

172285139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250117.

The product of its digits is 30240, while the sum is 38.

The square root of 172285139 is about 13125.7433694248. The cubic root of 172285139 is about 556.4369215003.

The spelling of 172285139 in words is "one hundred seventy-two million, two hundred eighty-five thousand, one hundred thirty-nine".