12442156 has 12 divisors (see below), whose sum is σ = 22143240. Its totient is φ = 6115520.

The previous prime is 12442153. The next prime is 12442159. The reversal of 12442156 is 65124421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12442153) and next prime (12442159).

It is a self number, because there is not a number n which added to its sum of digits gives 12442156.

It is not an unprimeable number, because it can be changed into a prime (12442151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26125 + ... + 26596.

It is an arithmetic number, because the mean of its divisors is an integer number (1845270).

Almost surely, 2^12442156 is an apocalyptic number.

It is an amenable number.

12442156 is a deficient number, since it is larger than the sum of its proper divisors (9701084).

12442156 is a wasteful number, since it uses less digits than its factorization.

12442156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52784 (or 52782 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 12442156 is about 3527.3440433278. The cubic root of 12442156 is about 231.7209039778.

Adding to 12442156 its reverse (65124421), we get a palindrome (77566577).

The spelling of 12442156 in words is "twelve million, four hundred forty-two thousand, one hundred fifty-six".