128613625 has 16 divisors (see below), whose sum is σ = 183441024. Its totient is φ = 88191600.

The previous prime is 128613623. The next prime is 128613629. The reversal of 128613625 is 526316821.

It is not a de Polignac number, because 128613625 - 2¹ = 128613623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128613623) 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, 72619 + ... + 74368.

It is an arithmetic number, because the mean of its divisors is an integer number (11465064).

Almost surely, 2^128613625 is an apocalyptic number.

It is an amenable number.

128613625 is a deficient number, since it is larger than the sum of its proper divisors (54827399).

128613625 is an equidigital number, since it uses as much as digits as its factorization.

128613625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147009 (or 146999 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 128613625 is about 11340.7947252386. The cubic root of 128613625 is about 504.7724688162.

The spelling of 128613625 in words is "one hundred twenty-eight million, six hundred thirteen thousand, six hundred twenty-five".