129132205 has 16 divisors (see below), whose sum is σ = 160395264. Its totient is φ = 99699840.

The previous prime is 129132193. The next prime is 129132229. The reversal of 129132205 is 502231921.

It is a happy number.

It is not a de Polignac number, because 129132205 - 2¹⁹ = 128607917 is a prime.

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 129132205.

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, 69924 + ... + 71746.

It is an arithmetic number, because the mean of its divisors is an integer number (10024704).

Almost surely, 2^129132205 is an apocalyptic number.

It is an amenable number.

129132205 is a deficient number, since it is larger than the sum of its proper divisors (31263059).

129132205 is a wasteful number, since it uses less digits than its factorization.

129132205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 129132205 is about 11363.6352018181. The cubic root of 129132205 is about 505.4499861325.

The spelling of 129132205 in words is "one hundred twenty-nine million, one hundred thirty-two thousand, two hundred five".