129890625 has 56 divisors (see below), whose sum is σ = 230622048. Its totient is φ = 64800000.

The previous prime is 129890611. The next prime is 129890633. The reversal of 129890625 is 526098921.

It is not a de Polignac number, because 129890625 - 2¹⁵ = 129857857 is a prime.

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 55 ways as a sum of consecutive naturals, for example, 796794 + ... + 796956.

Almost surely, 2^129890625 is an apocalyptic number.

129890625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129890625 is a deficient number, since it is larger than the sum of its proper divisors (100731423).

129890625 is an frugal number, since it uses more digits than its factorization.

129890625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 129890625 is about 11396.9568306632. The cubic root of 129890625 is about 506.4375924203.

The spelling of 129890625 in words is "one hundred twenty-nine million, eight hundred ninety thousand, six hundred twenty-five".