129129632 has 24 divisors (see below), whose sum is σ = 262426752. Its totient is φ = 62481600.

The previous prime is 129129629. The next prime is 129129641. The reversal of 129129632 is 236921921.

It is a junction number, because it is equal to n+sod(n) for n = 129129592 and 129129601.

It is a congruent 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, 64094 + ... + 66077.

It is an arithmetic number, because the mean of its divisors is an integer number (10934448).

Almost surely, 2^129129632 is an apocalyptic number.

It is an amenable number.

129129632 is an abundant number, since it is smaller than the sum of its proper divisors (133297120).

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

129129632 is a wasteful number, since it uses less digits than its factorization.

129129632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130212 (or 130204 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 129129632 is about 11363.5219892426. The cubic root of 129129632 is about 505.4466290266.

The spelling of 129129632 in words is "one hundred twenty-nine million, one hundred twenty-nine thousand, six hundred thirty-two".