172974529 has 16 divisors (see below), whose sum is σ = 215595520. Its totient is φ = 135120960.

The previous prime is 172974517. The next prime is 172974533. The reversal of 172974529 is 925479271.

It is a happy number.

It is not a de Polignac number, because 172974529 - 2⁵ = 172974497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172974029) 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, 4842 + ... + 19219.

It is an arithmetic number, because the mean of its divisors is an integer number (13474720).

Almost surely, 2^172974529 is an apocalyptic number.

It is an amenable number.

172974529 is a deficient number, since it is larger than the sum of its proper divisors (42620991).

172974529 is a wasteful number, since it uses less digits than its factorization.

172974529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24160.

The product of its digits is 317520, while the sum is 46.

The square root of 172974529 is about 13151.9781401886. The cubic root of 172974529 is about 557.1781181997.

The spelling of 172974529 in words is "one hundred seventy-two million, nine hundred seventy-four thousand, five hundred twenty-nine".