129125390 has 32 divisors (see below), whose sum is σ = 235746720. Its totient is φ = 50918400.

The previous prime is 129125351. The next prime is 129125407. The reversal of 129125390 is 93521921.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315506 + ... + 315914.

It is an arithmetic number, because the mean of its divisors is an integer number (7367085).

Almost surely, 2^129125390 is an apocalyptic number.

129125390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129125390 is a deficient number, since it is larger than the sum of its proper divisors (106621330).

129125390 is a wasteful number, since it uses less digits than its factorization.

129125390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 129125390 is about 11363.3353378311. The cubic root of 129125390 is about 505.4410942059.

The spelling of 129125390 in words is "one hundred twenty-nine million, one hundred twenty-five thousand, three hundred ninety".