225045 has 16 divisors (see below), whose sum is σ = 400320. Its totient is φ = 119952.

The previous prime is 225037. The next prime is 225061. The reversal of 225045 is 540522.

It is not a de Polignac number, because 225045 - 2³ = 225037 is a prime.

It is an Ulam number.

225045 is a lucky number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 699 + ... + 968.

It is an arithmetic number, because the mean of its divisors is an integer number (25020).

2²²⁵⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

225045 is a deficient number, since it is larger than the sum of its proper divisors (175275).

225045 is a wasteful number, since it uses less digits than its factorization.

225045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681 (or 1675 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 225045 is about 474.3890808187. The cubic root of 225045 is about 60.8260744868.

Adding to 225045 its reverse (540522), we get a palindrome (765567).

The spelling of 225045 in words is "two hundred twenty-five thousand, forty-five".