225439 has 4 divisors (see below), whose sum is σ = 229320. Its totient is φ = 221560.

The previous prime is 225431. The next prime is 225457. The reversal of 225439 is 934522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934522 = 2 ⋅467261.

It is a cyclic number.

It is not a de Polignac number, because 225439 - 2³ = 225431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225431) by changing a digit.

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, 1852 + ... + 1969.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2²²⁵⁴³⁹ is an apocalyptic number.

225439 is a deficient number, since it is larger than the sum of its proper divisors (3881).

225439 is an equidigital number, since it uses as much as digits as its factorization.

225439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880.

The product of its digits is 2160, while the sum is 25.

The square root of 225439 is about 474.8041701586. The cubic root of 225439 is about 60.8615510966.

The spelling of 225439 in words is "two hundred twenty-five thousand, four hundred thirty-nine".