12353521 has 2 divisors, whose sum is σ = 12353522. Its totient is φ = 12353520.

The previous prime is 12353501. The next prime is 12353533. The reversal of 12353521 is 12535321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8208225 + 4145296 = 2865^2 + 2036^2 .

It is an emirp because it is prime and its reverse (12535321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12353521 - 2⁵ = 12353489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12353492 and 12353501.

It is not a weakly prime, because it can be changed into another prime (12353501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6176760 + 6176761.

It is an arithmetic number, because the mean of its divisors is an integer number (6176761).

Almost surely, 2^12353521 is an apocalyptic number.

It is an amenable number.

12353521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12353521 is an equidigital number, since it uses as much as digits as its factorization.

12353521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 22.

The square root of 12353521 is about 3514.7576018838. The cubic root of 12353521 is about 231.1693504008.

Adding to 12353521 its reverse (12535321), we get a palindrome (24888842).

The spelling of 12353521 in words is "twelve million, three hundred fifty-three thousand, five hundred twenty-one".