128715155 has 16 divisors (see below), whose sum is σ = 157036320. Its totient is φ = 101265408.

The previous prime is 128715151. The next prime is 128715161. The reversal of 128715155 is 551517821.

It is a cyclic number.

It is not a de Polignac number, because 128715155 - 2² = 128715151 is a prime.

It is a super-2 number, since 2×128715155² = 33135182253348050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128715151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111059 + ... + 112211.

It is an arithmetic number, because the mean of its divisors is an integer number (9814770).

Almost surely, 2^128715155 is an apocalyptic number.

128715155 is a deficient number, since it is larger than the sum of its proper divisors (28321165).

128715155 is a wasteful number, since it uses less digits than its factorization.

128715155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510.

The product of its digits is 14000, while the sum is 35.

The square root of 128715155 is about 11345.2701598508. The cubic root of 128715155 is about 504.9052594877.

The spelling of 128715155 in words is "one hundred twenty-eight million, seven hundred fifteen thousand, one hundred fifty-five".