128225 has 12 divisors (see below), whose sum is σ = 166656. Its totient is φ = 97680.

The previous prime is 128221. The next prime is 128237. The reversal of 128225 is 522821.

It is not a de Polignac number, because 128225 - 2² = 128221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128197 and 128206.

It is not an unprimeable number, because it can be changed into a prime (128221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (13888).

2¹²⁸²²⁵ is an apocalyptic number.

It is an amenable number.

128225 is a deficient number, since it is larger than the sum of its proper divisors (38431).

128225 is a wasteful number, since it uses less digits than its factorization.

128225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 251 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 128225 is about 358.0851853959. The cubic root of 128225 is about 50.4263541099.

It can be divided in two parts, 128 and 225, that added together give a palindrome (353).

The spelling of 128225 in words is "one hundred twenty-eight thousand, two hundred twenty-five".