225739 has 6 divisors (see below), whose sum is σ = 239820. Its totient is φ = 211896.

The previous prime is 225733. The next prime is 225749. The reversal of 225739 is 937522.

It is not a de Polignac number, because 225739 - 2⁷ = 225611 is a prime.

It is a super-2 number, since 2×225739² = 101916192242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (225733) 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 5 ways as a sum of consecutive naturals, for example, 2017 + ... + 2125.

It is an arithmetic number, because the mean of its divisors is an integer number (39970).

2²²⁵⁷³⁹ is an apocalyptic number.

225739 is a deficient number, since it is larger than the sum of its proper divisors (14081).

225739 is an equidigital number, since it uses as much as digits as its factorization.

225739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 128 counting only the distinct ones).

The product of its digits is 3780, while the sum is 28.

The square root of 225739 is about 475.1199848459. The cubic root of 225739 is about 60.8885360345. Note that the first 3 decimals are identical.

The spelling of 225739 in words is "two hundred twenty-five thousand, seven hundred thirty-nine".