129132625 has 8 divisors (see below), whose sum is σ = 161157672. Its totient is φ = 103306000.

The previous prime is 129132613. The next prime is 129132631. The reversal of 129132625 is 526231921.

It can be written as a sum of positive squares in 4 ways, for example, as 173889 + 128958736 = 417^2 + 11356^2 .

It is not a de Polignac number, because 129132625 - 2⁵ = 129132593 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 516406 + ... + 516655.

It is an arithmetic number, because the mean of its divisors is an integer number (20144709).

Almost surely, 2^129132625 is an apocalyptic number.

It is an amenable number.

129132625 is a deficient number, since it is larger than the sum of its proper divisors (32025047).

129132625 is an equidigital number, since it uses as much as digits as its factorization.

129132625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033076 (or 1033066 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 129132625 is about 11363.6536818050. The cubic root of 129132625 is about 505.4505341206.

The spelling of 129132625 in words is "one hundred twenty-nine million, one hundred thirty-two thousand, six hundred twenty-five".