129252892 has 24 divisors (see below), whose sum is σ = 228445056. Its totient is φ = 63986928.

The previous prime is 129252859. The next prime is 129252901. The reversal of 129252892 is 298252921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256713 + ... + 257215.

It is an arithmetic number, because the mean of its divisors is an integer number (9518544).

Almost surely, 2^129252892 is an apocalyptic number.

It is an amenable number.

129252892 is a deficient number, since it is larger than the sum of its proper divisors (99192164).

129252892 is a wasteful number, since it uses less digits than its factorization.

129252892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1015 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 129252892 is about 11368.9441902052. The cubic root of 129252892 is about 505.6074016752.

The spelling of 129252892 in words is "one hundred twenty-nine million, two hundred fifty-two thousand, eight hundred ninety-two".