128875015 has 8 divisors (see below), whose sum is σ = 154729008. Its totient is φ = 103047360.

The previous prime is 128875009. The next prime is 128875039. The reversal of 128875015 is 510578821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128875015 - 2³ = 128875007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6580 + ... + 17350.

It is an arithmetic number, because the mean of its divisors is an integer number (19341126).

Almost surely, 2^128875015 is an apocalyptic number.

128875015 is a deficient number, since it is larger than the sum of its proper divisors (25853993).

128875015 is a wasteful number, since it uses less digits than its factorization.

128875015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13169.

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

The square root of 128875015 is about 11352.3132004011. The cubic root of 128875015 is about 505.1141982695.

The spelling of 128875015 in words is "one hundred twenty-eight million, eight hundred seventy-five thousand, fifteen".