129625020 has 72 divisors (see below), whose sum is σ = 449371104. Its totient is φ = 29628288.

The previous prime is 129625007. The next prime is 129625021. The reversal of 129625020 is 20526921.

129625020 is a `hidden beast` number, since 12 + 9 + 625 + 0 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129625021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50179 + ... + 52698.

Almost surely, 2^129625020 is an apocalyptic number.

129625020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129625020 is an abundant number, since it is smaller than the sum of its proper divisors (319746084).

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

129625020 is a wasteful number, since it uses less digits than its factorization.

129625020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102899 (or 102894 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 129625020 is about 11385.2984150614. The cubic root of 129625020 is about 506.0921629580.

The spelling of 129625020 in words is "one hundred twenty-nine million, six hundred twenty-five thousand, twenty".