128287625 has 16 divisors (see below), whose sum is σ = 160672512. Its totient is φ = 102265200.

The previous prime is 128287609. The next prime is 128287651. The reversal of 128287625 is 526782821.

It is not a de Polignac number, because 128287625 - 2⁴ = 128287609 is a prime.

It is a super-3 number, since 3×128287625³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 36704 + ... + 40046.

It is an arithmetic number, because the mean of its divisors is an integer number (10042032).

Almost surely, 2^128287625 is an apocalyptic number.

It is an amenable number.

128287625 is a deficient number, since it is larger than the sum of its proper divisors (32384887).

128287625 is an equidigital number, since it uses as much as digits as its factorization.

128287625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665 (or 3655 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 128287625 is about 11326.4127154188. The cubic root of 128287625 is about 504.3456217242.

The spelling of 128287625 in words is "one hundred twenty-eight million, two hundred eighty-seven thousand, six hundred twenty-five".