129402485 has 16 divisors (see below), whose sum is σ = 162781056. Its totient is φ = 98564928.

The previous prime is 129402479. The next prime is 129402491. The reversal of 129402485 is 584204921.

It is an interprime number because it is at equal distance from previous prime (129402479) and next prime (129402491).

It is a cyclic number.

It is not a de Polignac number, because 129402485 - 2²⁰ = 128353909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23627 + ... + 28583.

It is an arithmetic number, because the mean of its divisors is an integer number (10173816).

Almost surely, 2^129402485 is an apocalyptic number.

It is an amenable number.

129402485 is a deficient number, since it is larger than the sum of its proper divisors (33378571).

129402485 is a wasteful number, since it uses less digits than its factorization.

129402485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5212.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 129402485 is about 11375.5213067358. The cubic root of 129402485 is about 505.8023842048.

The spelling of 129402485 in words is "one hundred twenty-nine million, four hundred two thousand, four hundred eighty-five".