128530375 has 8 divisors (see below), whose sum is σ = 160406064. Its totient is φ = 102824200.

The previous prime is 128530333. The next prime is 128530399. The reversal of 128530375 is 573035821.

It is not a de Polignac number, because 128530375 - 2¹¹ = 128528327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128530375.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513997 + ... + 514246.

It is an arithmetic number, because the mean of its divisors is an integer number (20050758).

Almost surely, 2^128530375 is an apocalyptic number.

128530375 is a deficient number, since it is larger than the sum of its proper divisors (31875689).

128530375 is an equidigital number, since it uses as much as digits as its factorization.

128530375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028258 (or 1028248 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 128530375 is about 11337.1237534041. The cubic root of 128530375 is about 504.6635343283.

The spelling of 128530375 in words is "one hundred twenty-eight million, five hundred thirty thousand, three hundred seventy-five".