129495172 has 6 divisors (see below), whose sum is σ = 226616558. Its totient is φ = 64747584.

The previous prime is 129495143. The next prime is 129495181. The reversal of 129495172 is 271594921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 129413376 + 81796 = 11376^2 + 286^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16186893 + ... + 16186900.

Almost surely, 2^129495172 is an apocalyptic number.

It is an amenable number.

129495172 is a deficient number, since it is larger than the sum of its proper divisors (97121386).

129495172 is a wasteful number, since it uses less digits than its factorization.

129495172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32373797 (or 32373795 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 129495172 is about 11379.5945446224. The cubic root of 129495172 is about 505.9231189208.

The spelling of 129495172 in words is "one hundred twenty-nine million, four hundred ninety-five thousand, one hundred seventy-two".