129900625 has 20 divisors (see below), whose sum is σ = 170882800. Its totient is φ = 98442000.

The previous prime is 129900611. The next prime is 129900629. The reversal of 129900625 is 526009921.

It is a de Polignac number, because none of the positive numbers 2^k-129900625 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129900629) 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 19 ways as a sum of consecutive naturals, for example, 6406 + ... + 17344.

It is an arithmetic number, because the mean of its divisors is an integer number (8544140).

Almost surely, 2^129900625 is an apocalyptic number.

It is an amenable number.

129900625 is a deficient number, since it is larger than the sum of its proper divisors (40982175).

129900625 is an equidigital number, since it uses as much as digits as its factorization.

129900625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10978 (or 10963 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 129900625 is about 11397.3955358231. The cubic root of 129900625 is about 506.4505886006.

The spelling of 129900625 in words is "one hundred twenty-nine million, nine hundred thousand, six hundred twenty-five".