172129732 has 48 divisors (see below), whose sum is σ = 324817920. Its totient is φ = 79632000.

The previous prime is 172129729. The next prime is 172129781. The reversal of 172129732 is 237921271.

It is a super-3 number, since 3×172129732³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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, 542838 + ... + 543154.

It is an arithmetic number, because the mean of its divisors is an integer number (6767040).

Almost surely, 2^172129732 is an apocalyptic number.

It is an amenable number.

172129732 is a deficient number, since it is larger than the sum of its proper divisors (152688188).

172129732 is a wasteful number, since it uses less digits than its factorization.

172129732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 530 counting only the distinct ones).

The product of its digits is 10584, while the sum is 34.

The square root of 172129732 is about 13119.8221024525. The cubic root of 172129732 is about 556.2695628856.

The spelling of 172129732 in words is "one hundred seventy-two million, one hundred twenty-nine thousand, seven hundred thirty-two".