129540632 has 32 divisors (see below), whose sum is σ = 275343600. Its totient is φ = 56640384.

The previous prime is 129540611. The next prime is 129540641. The reversal of 129540632 is 236045921.

It is a happy number.

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, 30803 + ... + 34754.

Almost surely, 2^129540632 is an apocalyptic number.

It is an amenable number.

129540632 is an abundant number, since it is smaller than the sum of its proper divisors (145802968).

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

129540632 is a wasteful number, since it uses less digits than its factorization.

129540632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65595 (or 65591 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 129540632 is about 11381.5918043128. The cubic root of 129540632 is about 505.9823143688.

The spelling of 129540632 in words is "one hundred twenty-nine million, five hundred forty thousand, six hundred thirty-two".