129542632 has 16 divisors (see below), whose sum is σ = 244116000. Its totient is φ = 64445040.

The previous prime is 129542593. The next prime is 129542663. The reversal of 129542632 is 236245921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39094 + ... + 42277.

It is an arithmetic number, because the mean of its divisors is an integer number (15257250).

Almost surely, 2^129542632 is an apocalyptic number.

It is an amenable number.

129542632 is a deficient number, since it is larger than the sum of its proper divisors (114573368).

129542632 is a wasteful number, since it uses less digits than its factorization.

129542632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81576 (or 81572 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 129542632 is about 11381.6796651461. The cubic root of 129542632 is about 505.9849183379.

The spelling of 129542632 in words is "one hundred twenty-nine million, five hundred forty-two thousand, six hundred thirty-two".