129402575 has 12 divisors (see below), whose sum is σ = 161077488. Its totient is φ = 103123200.

The previous prime is 129402563. The next prime is 129402583. The reversal of 129402575 is 575204921.

It is a de Polignac number, because none of the positive numbers 2^k-129402575 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 3266 + ... + 16415.

It is an arithmetic number, because the mean of its divisors is an integer number (13423124).

Almost surely, 2^129402575 is an apocalyptic number.

129402575 is a deficient number, since it is larger than the sum of its proper divisors (31674913).

129402575 is a wasteful number, since it uses less digits than its factorization.

129402575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19954 (or 19949 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 129402575 is about 11375.5252625978. The cubic root of 129402575 is about 505.8025014674.

The spelling of 129402575 in words is "one hundred twenty-nine million, four hundred two thousand, five hundred seventy-five".