129378625 has 16 divisors (see below), whose sum is σ = 162339840. Its totient is φ = 102942000.

The previous prime is 129378589. The next prime is 129378629. The reversal of 129378625 is 526873921.

It is not a de Polignac number, because 129378625 - 2⁷ = 129378497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129378629) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21166 + ... + 26584.

It is an arithmetic number, because the mean of its divisors is an integer number (10146240).

Almost surely, 2^129378625 is an apocalyptic number.

It is an amenable number.

129378625 is a deficient number, since it is larger than the sum of its proper divisors (32961215).

129378625 is an equidigital number, since it uses as much as digits as its factorization.

129378625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5625 (or 5615 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 129378625 is about 11374.4725152422. The cubic root of 129378625 is about 505.7712946764.

The spelling of 129378625 in words is "one hundred twenty-nine million, three hundred seventy-eight thousand, six hundred twenty-five".