129766925 has 24 divisors (see below), whose sum is σ = 164052000. Its totient is φ = 101810880.

The previous prime is 129766907. The next prime is 129766939. The reversal of 129766925 is 529667921.

It is not a de Polignac number, because 129766925 - 2⁸ = 129766669 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129766925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371651 + ... + 371999.

It is an arithmetic number, because the mean of its divisors is an integer number (6835500).

Almost surely, 2^129766925 is an apocalyptic number.

It is an amenable number.

129766925 is a deficient number, since it is larger than the sum of its proper divisors (34285075).

129766925 is a wasteful number, since it uses less digits than its factorization.

129766925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 600 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 129766925 is about 11391.5286507123. The cubic root of 129766925 is about 506.2767744819.

The spelling of 129766925 in words is "one hundred twenty-nine million, seven hundred sixty-six thousand, nine hundred twenty-five".