129240924 has 24 divisors (see below), whose sum is σ = 307253520. Its totient is φ = 42267264.

The previous prime is 129240899. The next prime is 129240967. The reversal of 129240924 is 429042921.

It is a congruent number.

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, 100969 + ... + 102240.

It is an arithmetic number, because the mean of its divisors is an integer number (12802230).

Almost surely, 2^129240924 is an apocalyptic number.

It is an amenable number.

129240924 is an abundant number, since it is smaller than the sum of its proper divisors (178012596).

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

129240924 is a wasteful number, since it uses less digits than its factorization.

129240924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203269 (or 203267 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 129240924 is about 11368.4178318709. The cubic root of 129240924 is about 505.5917958448.

The spelling of 129240924 in words is "one hundred twenty-nine million, two hundred forty thousand, nine hundred twenty-four".