12523321 has 2 divisors, whose sum is σ = 12523322. Its totient is φ = 12523320.

The previous prime is 12523283. The next prime is 12523333. The reversal of 12523321 is 12332521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 929296 = 3405^2 + 964^2 .

It is an emirp because it is prime and its reverse (12332521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12523321 - 2¹⁷ = 12392249 is a prime.

It is not a weakly prime, because it can be changed into another prime (12523391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6261660 + 6261661.

It is an arithmetic number, because the mean of its divisors is an integer number (6261661).

Almost surely, 2^12523321 is an apocalyptic number.

It is an amenable number.

12523321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12523321 is an equidigital number, since it uses as much as digits as its factorization.

12523321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 19.

The square root of 12523321 is about 3538.8304565209. The cubic root of 12523321 is about 232.2236806741.

Adding to 12523321 its reverse (12332521), we get a palindrome (24855842).

The spelling of 12523321 in words is "twelve million, five hundred twenty-three thousand, three hundred twenty-one".