225123 has 4 divisors (see below), whose sum is σ = 300168. Its totient is φ = 150080.

The previous prime is 225119. The next prime is 225133. The reversal of 225123 is 321522.

225123 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225123 - 2² = 225119 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (225133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37518 + ... + 37523.

It is an arithmetic number, because the mean of its divisors is an integer number (75042).

2²²⁵¹²³ is an apocalyptic number.

225123 is a deficient number, since it is larger than the sum of its proper divisors (75045).

225123 is an equidigital number, since it uses as much as digits as its factorization.

225123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75044.

The product of its digits is 120, while the sum is 15.

The square root of 225123 is about 474.4712846949. The cubic root of 225123 is about 60.8331010604.

Adding to 225123 its reverse (321522), we get a palindrome (546645).

The spelling of 225123 in words is "two hundred twenty-five thousand, one hundred twenty-three".