128225239 has 8 divisors (see below), whose sum is σ = 132176768. Its totient is φ = 124299360.

The previous prime is 128225213. The next prime is 128225261. The reversal of 128225239 is 932522821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128225239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128222239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3994 + ... + 16504.

It is an arithmetic number, because the mean of its divisors is an integer number (16522096).

Almost surely, 2^128225239 is an apocalyptic number.

128225239 is a deficient number, since it is larger than the sum of its proper divisors (3951529).

128225239 is a wasteful number, since it uses less digits than its factorization.

128225239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825.

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

The square root of 128225239 is about 11323.6583752778. The cubic root of 128225239 is about 504.2638543996.

The spelling of 128225239 in words is "one hundred twenty-eight million, two hundred twenty-five thousand, two hundred thirty-nine".