129917115 has 40 divisors (see below), whose sum is σ = 236879280. Its totient is φ = 68102208.

The previous prime is 129917113. The next prime is 129917119. The reversal of 129917115 is 511719921.

It is not a de Polignac number, because 129917115 - 2¹ = 129917113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129917115.

It is not an unprimeable number, because it can be changed into a prime (129917113) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 21177 + ... + 26613.

It is an arithmetic number, because the mean of its divisors is an integer number (5921982).

Almost surely, 2^129917115 is an apocalyptic number.

129917115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129917115 is a deficient number, since it is larger than the sum of its proper divisors (106962165).

129917115 is an equidigital number, since it uses as much as digits as its factorization.

129917115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513 (or 5504 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 129917115 is about 11398.1189237523. The cubic root of 129917115 is about 506.4720178453.

The spelling of 129917115 in words is "one hundred twenty-nine million, nine hundred seventeen thousand, one hundred fifteen".