129520204 has 12 divisors (see below), whose sum is σ = 247265928. Its totient is φ = 58872800.

The previous prime is 129520151. The next prime is 129520213. The reversal of 129520204 is 402025921.

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 3 ways as a sum of consecutive naturals, for example, 1471777 + ... + 1471864.

It is an arithmetic number, because the mean of its divisors is an integer number (20605494).

Almost surely, 2^129520204 is an apocalyptic number.

It is an amenable number.

129520204 is a deficient number, since it is larger than the sum of its proper divisors (117745724).

129520204 is a wasteful number, since it uses less digits than its factorization.

129520204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943656 (or 2943654 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 129520204 is about 11380.6943549153. The cubic root of 129520204 is about 505.9557158930.

The spelling of 129520204 in words is "one hundred twenty-nine million, five hundred twenty thousand, two hundred four".