12821244 has 12 divisors (see below), whose sum is σ = 29916264. Its totient is φ = 4273744.

The previous prime is 12821227. The next prime is 12821261. The reversal of 12821244 is 44212821.

It is an interprime number because it is at equal distance from previous prime (12821227) and next prime (12821261).

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 534207 + ... + 534230.

It is an arithmetic number, because the mean of its divisors is an integer number (2493022).

Almost surely, 2^12821244 is an apocalyptic number.

It is an amenable number.

12821244 is an abundant number, since it is smaller than the sum of its proper divisors (17095020).

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

12821244 is a wasteful number, since it uses less digits than its factorization.

12821244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068444 (or 1068442 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 12821244 is about 3580.6764724002. The cubic root of 12821244 is about 234.0507596801.

The spelling of 12821244 in words is "twelve million, eight hundred twenty-one thousand, two hundred forty-four".