128590065 has 32 divisors (see below), whose sum is σ = 230098560. Its totient is φ = 68133312.

The previous prime is 128590039. The next prime is 128590093. The reversal of 128590065 is 560095821.

It is a happy number.

128590065 is a `hidden beast` number, since 1 + 2 + 8 + 590 + 0 + 65 = 666.

It is not a de Polignac number, because 128590065 - 2⁶ = 128590001 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 18162 + ... + 24228.

It is an arithmetic number, because the mean of its divisors is an integer number (7190580).

Almost surely, 2^128590065 is an apocalyptic number.

128590065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128590065 is a deficient number, since it is larger than the sum of its proper divisors (101508495).

128590065 is a wasteful number, since it uses less digits than its factorization.

128590065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6232 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 128590065 is about 11339.7559497548. The cubic root of 128590065 is about 504.7416447994.

The spelling of 128590065 in words is "one hundred twenty-eight million, five hundred ninety thousand, sixty-five".