129385100 has 36 divisors (see below), whose sum is σ = 302366064. Its totient is φ = 47772480.

The previous prime is 129385073. The next prime is 129385177. The reversal of 129385100 is 1583921.

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 11 ways as a sum of consecutive naturals, for example, 48464 + ... + 51063.

Almost surely, 2^129385100 is an apocalyptic number.

129385100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129385100 is an abundant number, since it is smaller than the sum of its proper divisors (172980964).

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

129385100 is a wasteful number, since it uses less digits than its factorization.

129385100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99554 (or 99547 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 129385100 is about 11374.7571402646. The cubic root of 129385100 is about 505.7797319652.

The spelling of 129385100 in words is "one hundred twenty-nine million, three hundred eighty-five thousand, one hundred".