225642 has 8 divisors (see below), whose sum is σ = 451296. Its totient is φ = 75212.

The previous prime is 225637. The next prime is 225671. The reversal of 225642 is 246522.

It is a sphenic number, since it is the product of 3 distinct primes.

225642 is an admirable number.

It is a plaindrome in base 11 and base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18798 + ... + 18809.

It is an arithmetic number, because the mean of its divisors is an integer number (56412).

2²²⁵⁶⁴² is an apocalyptic number.

225642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225642 is a wasteful number, since it uses less digits than its factorization.

225642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37612.

The product of its digits is 960, while the sum is 21.

The square root of 225642 is about 475.0178943998. The cubic root of 225642 is about 60.8798135214.

The spelling of 225642 in words is "two hundred twenty-five thousand, six hundred forty-two".