128716625 has 16 divisors (see below), whose sum is σ = 167626368. Its totient is φ = 98494000.

The previous prime is 128716591. The next prime is 128716631. The reversal of 128716625 is 526617821.

It is not a de Polignac number, because 128716625 - 2²⁴ = 111939409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19511 + ... + 25260.

It is an arithmetic number, because the mean of its divisors is an integer number (10476648).

Almost surely, 2^128716625 is an apocalyptic number.

It is an amenable number.

128716625 is a deficient number, since it is larger than the sum of its proper divisors (38909743).

128716625 is an equidigital number, since it uses as much as digits as its factorization.

128716625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44809 (or 44799 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 128716625 is about 11345.3349443725. The cubic root of 128716625 is about 504.9071815818.

The spelling of 128716625 in words is "one hundred twenty-eight million, seven hundred sixteen thousand, six hundred twenty-five".