129538156 has 48 divisors (see below), whose sum is σ = 253064448. Its totient is φ = 57528000.

The previous prime is 129538133. The next prime is 129538163. The reversal of 129538156 is 651835921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457591 + ... + 457873.

It is an arithmetic number, because the mean of its divisors is an integer number (5272176).

Almost surely, 2^129538156 is an apocalyptic number.

It is an amenable number.

129538156 is a deficient number, since it is larger than the sum of its proper divisors (123526292).

129538156 is a wasteful number, since it uses less digits than its factorization.

129538156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 129538156 is about 11381.4830316616. The cubic root of 129538156 is about 505.9790906179.

The spelling of 129538156 in words is "one hundred twenty-nine million, five hundred thirty-eight thousand, one hundred fifty-six".