128915259 has 32 divisors (see below), whose sum is σ = 191213568. Its totient is φ = 76608000.

The previous prime is 128915257. The next prime is 128915261. The reversal of 128915259 is 952519821.

It is an interprime number because it is at equal distance from previous prime (128915257) and next prime (128915261).

It is not a de Polignac number, because 128915259 - 2¹ = 128915257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128915259.

It is not an unprimeable number, because it can be changed into a prime (128915251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674854 + ... + 675044.

It is an arithmetic number, because the mean of its divisors is an integer number (5975424).

Almost surely, 2^128915259 is an apocalyptic number.

128915259 is a deficient number, since it is larger than the sum of its proper divisors (62298309).

128915259 is a wasteful number, since it uses less digits than its factorization.

128915259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499.

The product of its digits is 64800, while the sum is 42.

The square root of 128915259 is about 11354.0855642363. The cubic root of 128915259 is about 505.1667703946.

The spelling of 128915259 in words is "one hundred twenty-eight million, nine hundred fifteen thousand, two hundred fifty-nine".