129120108 has 24 divisors (see below), whose sum is σ = 324456048. Its totient is φ = 39729216.

The previous prime is 129120071. The next prime is 129120127. The reversal of 129120108 is 801021921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413691 + ... + 414002.

It is an arithmetic number, because the mean of its divisors is an integer number (13519002).

Almost surely, 2^129120108 is an apocalyptic number.

It is an amenable number.

129120108 is an abundant number, since it is smaller than the sum of its proper divisors (195335940).

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

129120108 is a wasteful number, since it uses less digits than its factorization.

129120108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827713 (or 827711 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 129120108 is about 11363.1029212975. The cubic root of 129120108 is about 505.4342022583.

The spelling of 129120108 in words is "one hundred twenty-nine million, one hundred twenty thousand, one hundred eight".