12820144 has 20 divisors (see below), whose sum is σ = 25070320. Its totient is φ = 6350400.

The previous prime is 12820133. The next prime is 12820151. The reversal of 12820144 is 44102821.

12820144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932 + ... + 5419.

It is an arithmetic number, because the mean of its divisors is an integer number (1253516).

Almost surely, 2^12820144 is an apocalyptic number.

It is an amenable number.

12820144 is a deficient number, since it is larger than the sum of its proper divisors (12250176).

12820144 is a wasteful number, since it uses less digits than its factorization.

12820144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468 (or 7462 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 12820144 is about 3580.5228668450. The cubic root of 12820144 is about 234.0440660187.

Adding to 12820144 its reverse (44102821), we get a palindrome (56922965).

The spelling of 12820144 in words is "twelve million, eight hundred twenty thousand, one hundred forty-four".