225128 has 16 divisors (see below), whose sum is σ = 427680. Its totient is φ = 111088.

The previous prime is 225119. The next prime is 225133. The reversal of 225128 is 821522.

225128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725 + ... + 987.

It is an arithmetic number, because the mean of its divisors is an integer number (26730).

2²²⁵¹²⁸ is an apocalyptic number.

It is an amenable number.

225128 is a deficient number, since it is larger than the sum of its proper divisors (202552).

225128 is a wasteful number, since it uses less digits than its factorization.

225128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 372 counting only the distinct ones).

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

The square root of 225128 is about 474.4765536884. The cubic root of 225128 is about 60.8335514264.

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

The spelling of 225128 in words is "two hundred twenty-five thousand, one hundred twenty-eight".