12044821 has 4 divisors (see below), whose sum is σ = 12062944. Its totient is φ = 12026700.

The previous prime is 12044797. The next prime is 12044839. The reversal of 12044821 is 12844021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12044821 - 2¹⁵ = 12012053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12044792 and 12044801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12044861) by changing a digit.

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, 8025 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (3015736).

Almost surely, 2^12044821 is an apocalyptic number.

It is an amenable number.

12044821 is a deficient number, since it is larger than the sum of its proper divisors (18123).

12044821 is an equidigital number, since it uses as much as digits as its factorization.

12044821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18122.

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

The square root of 12044821 is about 3470.5649396028. The cubic root of 12044821 is about 229.2275345682.

Adding to 12044821 its reverse (12844021), we get a palindrome (24888842).

The spelling of 12044821 in words is "twelve million, forty-four thousand, eight hundred twenty-one".