129396872 has 16 divisors (see below), whose sum is σ = 264675600. Its totient is φ = 58816720.

The previous prime is 129396851. The next prime is 129396887. The reversal of 129396872 is 278693921.

It is a happy number.

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, 735122 + ... + 735297.

It is an arithmetic number, because the mean of its divisors is an integer number (16542225).

Almost surely, 2^129396872 is an apocalyptic number.

It is an amenable number.

129396872 is an abundant number, since it is smaller than the sum of its proper divisors (135278728).

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

129396872 is a wasteful number, since it uses less digits than its factorization.

129396872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470436 (or 1470432 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 129396872 is about 11375.2745900923. The cubic root of 129396872 is about 505.7950708217.

The spelling of 129396872 in words is "one hundred twenty-nine million, three hundred ninety-six thousand, eight hundred seventy-two".