129375 has 30 divisors (see below), whose sum is σ = 243672. Its totient is φ = 66000.

The previous prime is 129361. The next prime is 129379. The reversal of 129375 is 573921.

It is not a de Polignac number, because 129375 - 2⁸ = 129119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129379) 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 29 ways as a sum of consecutive naturals, for example, 5614 + ... + 5636.

2¹²⁹³⁷⁵ is an apocalyptic number.

129375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129375 is a deficient number, since it is larger than the sum of its proper divisors (114297).

129375 is an equidigital number, since it uses as much as digits as its factorization.

129375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 31 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 129375 is about 359.6873642485. The cubic root of 129375 is about 50.5766570975.

The spelling of 129375 in words is "one hundred twenty-nine thousand, three hundred seventy-five".