129508912 has 20 divisors (see below), whose sum is σ = 270225760. Its totient is φ = 59773248.

The previous prime is 129508909. The next prime is 129508931. The reversal of 129508912 is 219805921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311112 + ... + 311527.

It is an arithmetic number, because the mean of its divisors is an integer number (13511288).

Almost surely, 2^129508912 is an apocalyptic number.

It is an amenable number.

129508912 is an abundant number, since it is smaller than the sum of its proper divisors (140716848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129508912 is a wasteful number, since it uses less digits than its factorization.

129508912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622660 (or 622654 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 129508912 is about 11380.1982408041. The cubic root of 129508912 is about 505.9410118345.

The spelling of 129508912 in words is "one hundred twenty-nine million, five hundred eight thousand, nine hundred twelve".