129662925 has 72 divisors (see below), whose sum is σ = 254144448. Its totient is φ = 57139200.

The previous prime is 129662917. The next prime is 129662947. The reversal of 129662925 is 529266921.

It is not a de Polignac number, because 129662925 - 2³ = 129662917 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 504397 + ... + 504653.

It is an arithmetic number, because the mean of its divisors is an integer number (3529784).

Almost surely, 2^129662925 is an apocalyptic number.

129662925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129662925 is a deficient number, since it is larger than the sum of its proper divisors (124481523).

129662925 is a wasteful number, since it uses less digits than its factorization.

129662925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 303 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 129662925 is about 11386.9629401347. The cubic root of 129662925 is about 506.1414887076.

The spelling of 129662925 in words is "one hundred twenty-nine million, six hundred sixty-two thousand, nine hundred twenty-five".