222642 has 64 divisors (see below), whose sum is σ = 614400. Its totient is φ = 58320.

The previous prime is 222619. The next prime is 222643. The reversal of 222642 is 246222.

It is a happy number.

222642 is a `hidden beast` number, since 2 + 22 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 222642.

It is not an unprimeable number, because it can be changed into a prime (222643) by changing a digit.

222642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7167 + ... + 7197.

It is an arithmetic number, because the mean of its divisors is an integer number (9600).

2²²²⁶⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307200).

222642 is an abundant number, since it is smaller than the sum of its proper divisors (391758).

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

222642 is a wasteful number, since it uses less digits than its factorization.

222642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 62 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 222642 is about 471.8495522939. The cubic root of 222642 is about 60.6088017801.

Adding to 222642 its reverse (246222), we get a palindrome (468864).

The spelling of 222642 in words is "two hundred twenty-two thousand, six hundred forty-two".