129955455 has 32 divisors (see below), whose sum is σ = 264038400. Its totient is φ = 59407776.

The previous prime is 129955447. The next prime is 129955471. The reversal of 129955455 is 554559921.

129955455 is a `hidden beast` number, since 1 + 2 + 99 + 554 + 5 + 5 = 666.

It is not a de Polignac number, because 129955455 - 2³ = 129955447 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 129955455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67815 + ... + 69704.

It is an arithmetic number, because the mean of its divisors is an integer number (8251200).

Almost surely, 2^129955455 is an apocalyptic number.

129955455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129955455 is an abundant number, since it is smaller than the sum of its proper divisors (134082945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129955455 is a wasteful number, since it uses less digits than its factorization.

129955455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137540 (or 137534 counting only the distinct ones).

The product of its digits is 405000, while the sum is 45.

The square root of 129955455 is about 11399.8006561518. The cubic root of 129955455 is about 506.5218348057.

The spelling of 129955455 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, four hundred fifty-five".