129732912 has 60 divisors (see below), whose sum is σ = 382189080. Its totient is φ = 40967424.

The previous prime is 129732887. The next prime is 129732919. The reversal of 129732912 is 219237921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (129732919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20973 + ... + 26444.

It is an arithmetic number, because the mean of its divisors is an integer number (6369818).

Almost surely, 2^129732912 is an apocalyptic number.

129732912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129732912 is an abundant number, since it is smaller than the sum of its proper divisors (252456168).

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

129732912 is a wasteful number, since it uses less digits than its factorization.

129732912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47450 (or 47441 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 129732912 is about 11390.0356452471. The cubic root of 129732912 is about 506.2325374864.

The spelling of 129732912 in words is "one hundred twenty-nine million, seven hundred thirty-two thousand, nine hundred twelve".