22142 has 4 divisors (see below), whose sum is σ = 33216. Its totient is φ = 11070.

The previous prime is 22133. The next prime is 22147. The reversal of 22142 is 24122.

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

It is a plaindrome in base 11 and base 16.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22142.

It is not an unprimeable number, because it can be changed into a prime (22147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5534 + ... + 5537.

It is an arithmetic number, because the mean of its divisors is an integer number (8304).

2²²¹⁴² is an apocalyptic number.

22142 is a deficient number, since it is larger than the sum of its proper divisors (11074).

22142 is a wasteful number, since it uses less digits than its factorization.

22142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11073.

The product of its digits is 32, while the sum is 11.

The square root of 22142 is about 148.8018817085. The cubic root of 22142 is about 28.0805503635.

Adding to 22142 its reverse (24122), we get a palindrome (46264).

The spelling of 22142 in words is "twenty-two thousand, one hundred forty-two", and thus it is an iban number.