12420444 has 48 divisors (see below), whose sum is σ = 30119040. Its totient is φ = 3981120.

The previous prime is 12420413. The next prime is 12420451. The reversal of 12420444 is 44402421.

It is a self number, because there is not a number n which added to its sum of digits gives 12420444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37359 + ... + 37689.

It is an arithmetic number, because the mean of its divisors is an integer number (627480).

Almost surely, 2^12420444 is an apocalyptic number.

It is an amenable number.

12420444 is an abundant number, since it is smaller than the sum of its proper divisors (17698596).

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

12420444 is a wasteful number, since it uses less digits than its factorization.

12420444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 12420444 is about 3524.2650297615. The cubic root of 12420444 is about 231.5860384555.

Adding to 12420444 its reverse (44402421), we get a palindrome (56822865).

The spelling of 12420444 in words is "twelve million, four hundred twenty thousand, four hundred forty-four".