129375612 has 36 divisors (see below), whose sum is σ = 338312520. Its totient is φ = 41637792.

The previous prime is 129375563. The next prime is 129375683. The reversal of 129375612 is 216573921.

129375612 is a `hidden beast` number, since 1 + 2 + 9 + 37 + 5 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60918 + ... + 63005.

It is an arithmetic number, because the mean of its divisors is an integer number (9397570).

Almost surely, 2^129375612 is an apocalyptic number.

129375612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129375612 is an abundant number, since it is smaller than the sum of its proper divisors (208936908).

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

129375612 is a wasteful number, since it uses less digits than its factorization.

129375612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123962 (or 123957 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 129375612 is about 11374.3400687688. The cubic root of 129375612 is about 505.7673684721.

The spelling of 129375612 in words is "one hundred twenty-nine million, three hundred seventy-five thousand, six hundred twelve".