12327521 has 2 divisors, whose sum is σ = 12327522. Its totient is φ = 12327520.

The previous prime is 12327503. The next prime is 12327529. The reversal of 12327521 is 12572321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12327121 + 400 = 3511^2 + 20^2 .

It is an emirp because it is prime and its reverse (12572321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12327521 - 2⁶ = 12327457 is a prime.

It is not a weakly prime, because it can be changed into another prime (12327529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6163760 + 6163761.

It is an arithmetic number, because the mean of its divisors is an integer number (6163761).

Almost surely, 2^12327521 is an apocalyptic number.

It is an amenable number.

12327521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12327521 is an equidigital number, since it uses as much as digits as its factorization.

12327521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 12327521 is about 3511.0569633659. The cubic root of 12327521 is about 231.0070586225.

Adding to 12327521 its reverse (12572321), we get a palindrome (24899842).

The spelling of 12327521 in words is "twelve million, three hundred twenty-seven thousand, five hundred twenty-one".