172572489 has 12 divisors (see below), whose sum is σ = 251602416. Its totient is φ = 113972472.

The previous prime is 172572487. The next prime is 172572509. The reversal of 172572489 is 984275271.

It is a happy number.

172572489 is a `hidden beast` number, since 1 + 72 + 572 + 4 + 8 + 9 = 666.

172572489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172572489 - 2¹ = 172572487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172572487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88639 + ... + 90564.

It is an arithmetic number, because the mean of its divisors is an integer number (20966868).

Almost surely, 2^172572489 is an apocalyptic number.

It is an amenable number.

172572489 is a deficient number, since it is larger than the sum of its proper divisors (79029927).

172572489 is a wasteful number, since it uses less digits than its factorization.

172572489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179316 (or 179313 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 172572489 is about 13136.6848557770. The cubic root of 172572489 is about 556.7461053321.

The spelling of 172572489 in words is "one hundred seventy-two million, five hundred seventy-two thousand, four hundred eighty-nine".