128015875 has 16 divisors (see below), whose sum is σ = 172055520. Its totient is φ = 94533600.

The previous prime is 128015843. The next prime is 128015879. The reversal of 128015875 is 578510821.

It is not a de Polignac number, because 128015875 - 2⁵ = 128015843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128015879) 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, 37765 + ... + 41014.

It is an arithmetic number, because the mean of its divisors is an integer number (10753470).

Almost surely, 2^128015875 is an apocalyptic number.

128015875 is a deficient number, since it is larger than the sum of its proper divisors (44039645).

128015875 is an equidigital number, since it uses as much as digits as its factorization.

128015875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78807 (or 78797 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 128015875 is about 11314.4100597424. The cubic root of 128015875 is about 503.9892537286.

The spelling of 128015875 in words is "one hundred twenty-eight million, fifteen thousand, eight hundred seventy-five".