12442 has 4 divisors (see below), whose sum is σ = 18666. Its totient is φ = 6220.

The previous prime is 12437. The next prime is 12451. The reversal of 12442 is 24421.

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

It can be written as a sum of positive squares in only one way, i.e., 12321 + 121 = 111^2 + 11^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3109 + ... + 3112.

2¹²⁴⁴² is an apocalyptic number.

12442 is a deficient number, since it is larger than the sum of its proper divisors (6224).

12442 is an equidigital number, since it uses as much as digits as its factorization.

12442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223.

The product of its digits is 64, while the sum is 13.

The square root of 12442 is about 111.5437134042. The cubic root of 12442 is about 23.1719935533.

Adding to 12442 its reverse (24421), we get a palindrome (36863).

It can be divided in two parts, 12 and 442, that added together give a palindrome (454).

The spelling of 12442 in words is "twelve thousand, four hundred forty-two", and thus it is an iban number.