129125600 has 36 divisors (see below), whose sum is σ = 315229824. Its totient is φ = 51649920.

The previous prime is 129125573. The next prime is 129125621. The reversal of 129125600 is 6521921.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 129125600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79904 + ... + 81503.

It is an arithmetic number, because the mean of its divisors is an integer number (8756384).

Almost surely, 2^129125600 is an apocalyptic number.

129125600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129125600 is an abundant number, since it is smaller than the sum of its proper divisors (186104224).

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

129125600 is a wasteful number, since it uses less digits than its factorization.

129125600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161427 (or 161414 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 129125600 is about 11363.3445780721. The cubic root of 129125600 is about 505.4413682098.

The spelling of 129125600 in words is "one hundred twenty-nine million, one hundred twenty-five thousand, six hundred".