12543413 has 2 divisors, whose sum is σ = 12543414. Its totient is φ = 12543412.

The previous prime is 12543397. The next prime is 12543449. The reversal of 12543413 is 31434521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12439729 + 103684 = 3527^2 + 322^2 .

It is a cyclic number.

It is not a de Polignac number, because 12543413 - 2⁴ = 12543397 is a prime.

It is a Chen prime.

It is equal to p₈₂₁₃₅₄ and since 12543413 and 821354 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271706 + 6271707.

It is an arithmetic number, because the mean of its divisors is an integer number (6271707).

Almost surely, 2^12543413 is an apocalyptic number.

It is an amenable number.

12543413 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543413 is an equidigital number, since it uses as much as digits as its factorization.

12543413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 12543413 is about 3541.6681098036. The cubic root of 12543413 is about 232.3478049692.

Adding to 12543413 its reverse (31434521), we get a palindrome (43977934).

The spelling of 12543413 in words is "twelve million, five hundred forty-three thousand, four hundred thirteen".