129911155 has 32 divisors (see below), whose sum is σ = 178329600. Its totient is φ = 89980800.

The previous prime is 129911147. The next prime is 129911179. The reversal of 129911155 is 551119921.

It is not a de Polignac number, because 129911155 - 2³ = 129911147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129911155.

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 31 ways as a sum of consecutive naturals, for example, 125490 + ... + 126520.

It is an arithmetic number, because the mean of its divisors is an integer number (5572800).

Almost surely, 2^129911155 is an apocalyptic number.

129911155 is a deficient number, since it is larger than the sum of its proper divisors (48418445).

129911155 is a wasteful number, since it uses less digits than its factorization.

129911155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155.

The product of its digits is 4050, while the sum is 34.

The square root of 129911155 is about 11397.8574741045. The cubic root of 129911155 is about 506.4642728576.

The spelling of 129911155 in words is "one hundred twenty-nine million, nine hundred eleven thousand, one hundred fifty-five".