129822975 has 36 divisors (see below), whose sum is σ = 233478856. Its totient is φ = 68955840.

The previous prime is 129822949. The next prime is 129822997. The reversal of 129822975 is 579228921.

It is a happy number.

It is not a de Polignac number, because 129822975 - 2⁵ = 129822943 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129822975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61284 + ... + 63366.

Almost surely, 2^129822975 is an apocalyptic number.

129822975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129822975 is a deficient number, since it is larger than the sum of its proper divisors (103655881).

129822975 is a wasteful number, since it uses less digits than its factorization.

129822975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2368 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 129822975 is about 11393.9885465977. The cubic root of 129822975 is about 506.3496557358.

The spelling of 129822975 in words is "one hundred twenty-nine million, eight hundred twenty-two thousand, nine hundred seventy-five".