129975630 has 16 divisors (see below), whose sum is σ = 311941584. Its totient is φ = 34660160.

The previous prime is 129975623. The next prime is 129975649. The reversal of 129975630 is 36579921.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 2166231 + ... + 2166290.

It is an arithmetic number, because the mean of its divisors is an integer number (19496349).

Almost surely, 2^129975630 is an apocalyptic number.

129975630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129975630 is an abundant number, since it is smaller than the sum of its proper divisors (181965954).

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

129975630 is a wasteful number, since it uses less digits than its factorization.

129975630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332531.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 129975630 is about 11400.6855057053. The cubic root of 129975630 is about 506.5480451951.

The spelling of 129975630 in words is "one hundred twenty-nine million, nine hundred seventy-five thousand, six hundred thirty".