128507015 has 32 divisors (see below), whose sum is σ = 193052160. Its totient is φ = 79945344.

The previous prime is 128506979. The next prime is 128507069. The reversal of 128507015 is 510705821.

It is a cyclic number.

It is not a de Polignac number, because 128507015 - 2⁶ = 128506951 is a prime.

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, 24452 + ... + 29238.

It is an arithmetic number, because the mean of its divisors is an integer number (6032880).

Almost surely, 2^128507015 is an apocalyptic number.

128507015 is a deficient number, since it is larger than the sum of its proper divisors (64545145).

128507015 is a wasteful number, since it uses less digits than its factorization.

128507015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 128507015 is about 11336.0934629175. The cubic root of 128507015 is about 504.6329587946.

The spelling of 128507015 in words is "one hundred twenty-eight million, five hundred seven thousand, fifteen".