128566625 has 16 divisors (see below), whose sum is σ = 175039488. Its totient is φ = 93502000.

The previous prime is 128566621. The next prime is 128566643. The reversal of 128566625 is 526665821.

It is not a de Polignac number, because 128566625 - 2² = 128566621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128566621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45377 + ... + 48126.

It is an arithmetic number, because the mean of its divisors is an integer number (10939968).

Almost surely, 2^128566625 is an apocalyptic number.

It is an amenable number.

128566625 is a deficient number, since it is larger than the sum of its proper divisors (46472863).

128566625 is an equidigital number, since it uses as much as digits as its factorization.

128566625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93529 (or 93519 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 128566625 is about 11338.7223707083. The cubic root of 128566625 is about 504.7109740445.

The spelling of 128566625 in words is "one hundred twenty-eight million, five hundred sixty-six thousand, six hundred twenty-five".