129905752 has 16 divisors (see below), whose sum is σ = 249238440. Its totient is φ = 63442176.

The previous prime is 129905731. The next prime is 129905759. The reversal of 129905752 is 257509921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129905759) 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, 188473 + ... + 189160.

Almost surely, 2^129905752 is an apocalyptic number.

It is an amenable number.

129905752 is a deficient number, since it is larger than the sum of its proper divisors (119332688).

129905752 is a wasteful number, since it uses less digits than its factorization.

129905752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377682 (or 377678 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 129905752 is about 11397.6204534104. The cubic root of 129905752 is about 506.4572514836.

The spelling of 129905752 in words is "one hundred twenty-nine million, nine hundred five thousand, seven hundred fifty-two".