129031125 has 16 divisors (see below), whose sum is σ = 214708416. Its totient is φ = 68816400.

The previous prime is 129031117. The next prime is 129031129. The reversal of 129031125 is 521130921.

It is not a de Polignac number, because 129031125 - 2³ = 129031117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129031095 and 129031104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129031129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 171667 + ... + 172416.

It is an arithmetic number, because the mean of its divisors is an integer number (13419276).

Almost surely, 2^129031125 is an apocalyptic number.

129031125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129031125 is a deficient number, since it is larger than the sum of its proper divisors (85677291).

129031125 is an equidigital number, since it uses as much as digits as its factorization.

129031125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344101 (or 344091 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 129031125 is about 11359.1868106832. The cubic root of 129031125 is about 505.3180690761.

It can be divided in two parts, 12903 and 1125, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 129031125 in words is "one hundred twenty-nine million, thirty-one thousand, one hundred twenty-five".