12444521 has 2 divisors, whose sum is σ = 12444522. Its totient is φ = 12444520.

The previous prime is 12444511. The next prime is 12444533. The reversal of 12444521 is 12544421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8970025 + 3474496 = 2995^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 12444521 - 2¹⁴ = 12428137 is a prime.

It is a super-2 number, since 2×12444521² = 309732205838882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12444511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6222260 + 6222261.

It is an arithmetic number, because the mean of its divisors is an integer number (6222261).

Almost surely, 2^12444521 is an apocalyptic number.

It is an amenable number.

12444521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12444521 is an equidigital number, since it uses as much as digits as its factorization.

12444521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 23.

The square root of 12444521 is about 3527.6792654662. The cubic root of 12444521 is about 231.7355848530.

Adding to 12444521 its reverse (12544421), we get a palindrome (24988942).

The spelling of 12444521 in words is "twelve million, four hundred forty-four thousand, five hundred twenty-one".