12220442 has 16 divisors (see below), whose sum is σ = 19817952. Its totient is φ = 5618160.

The previous prime is 12220441. The next prime is 12220447. The reversal of 12220442 is 24402221.

It is a happy number.

12220442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12220442.

It is not an unprimeable number, because it can be changed into a prime (12220441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7217 + ... + 8747.

It is an arithmetic number, because the mean of its divisors is an integer number (1238622).

Almost surely, 2^12220442 is an apocalyptic number.

12220442 is a deficient number, since it is larger than the sum of its proper divisors (7597510).

12220442 is a wasteful number, since it uses less digits than its factorization.

12220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 12220442 is about 3495.7748783353. The cubic root of 12220442 is about 230.3362567401.

Adding to 12220442 its reverse (24402221), we get a palindrome (36622663).

The spelling of 12220442 in words is "twelve million, two hundred twenty thousand, four hundred forty-two".