129672536 has 16 divisors (see below), whose sum is σ = 277869840. Its totient is φ = 55573920.

The previous prime is 129672533. The next prime is 129672553. The reversal of 129672536 is 635276921.

It is a junction number, because it is equal to n+sod(n) for n = 129672493 and 129672502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129672533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157735 + ... + 1157846.

It is an arithmetic number, because the mean of its divisors is an integer number (17366865).

Almost surely, 2^129672536 is an apocalyptic number.

It is an amenable number.

129672536 is an abundant number, since it is smaller than the sum of its proper divisors (148197304).

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

129672536 is a wasteful number, since it uses less digits than its factorization.

129672536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315594 (or 2315590 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 129672536 is about 11387.3849500225. The cubic root of 129672536 is about 506.1539939674.

The spelling of 129672536 in words is "one hundred twenty-nine million, six hundred seventy-two thousand, five hundred thirty-six".