128032225 has 6 divisors (see below), whose sum is σ = 158759990. Its totient is φ = 102425760.

The previous prime is 128032213. The next prime is 128032249. The reversal of 128032225 is 522230821.

It can be written as a sum of positive squares in 3 ways, for example, as 39841344 + 88190881 = 6312^2 + 9391^2 .

It is not a de Polignac number, because 128032225 - 2⁷ = 128032097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 5121289 = 128032225 / (1 + 2 + 8 + 0 + 3 + 2 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 128032225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2560620 + ... + 2560669.

Almost surely, 2^128032225 is an apocalyptic number.

It is an amenable number.

128032225 is a deficient number, since it is larger than the sum of its proper divisors (30727765).

128032225 is an equidigital number, since it uses as much as digits as its factorization.

128032225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121299 (or 5121294 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 128032225 is about 11315.1325666118. The cubic root of 128032225 is about 504.0107090716.

The spelling of 128032225 in words is "one hundred twenty-eight million, thirty-two thousand, two hundred twenty-five".