12441521 has 2 divisors, whose sum is σ = 12441522. Its totient is φ = 12441520.

The previous prime is 12441503. The next prime is 12441547. The reversal of 12441521 is 12514421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 442225 = 3464^2 + 665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12441521 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12441493 and 12441502.

It is not a weakly prime, because it can be changed into another prime (12441581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220760 + 6220761.

It is an arithmetic number, because the mean of its divisors is an integer number (6220761).

Almost surely, 2^12441521 is an apocalyptic number.

It is an amenable number.

12441521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12441521 is an equidigital number, since it uses as much as digits as its factorization.

12441521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 12441521 is about 3527.2540311126. The cubic root of 12441521 is about 231.7169618615.

Adding to 12441521 its reverse (12514421), we get a palindrome (24955942).

Subtracting 12441521 from its reverse (12514421), we obtain a square (72900 = 270²).

The spelling of 12441521 in words is "twelve million, four hundred forty-one thousand, five hundred twenty-one".