12713021 has 2 divisors, whose sum is σ = 12713022. Its totient is φ = 12713020.

The previous prime is 12713011. The next prime is 12713053. The reversal of 12713021 is 12031721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10310521 + 2402500 = 3211^2 + 1550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12713021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12713011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6356510 + 6356511.

It is an arithmetic number, because the mean of its divisors is an integer number (6356511).

Almost surely, 2^12713021 is an apocalyptic number.

It is an amenable number.

12713021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12713021 is an equidigital number, since it uses as much as digits as its factorization.

12713021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12713021 is about 3565.5323585686. The cubic root of 12713021 is about 233.3903640641.

Adding to 12713021 its reverse (12031721), we get a palindrome (24744742).

The spelling of 12713021 in words is "twelve million, seven hundred thirteen thousand, twenty-one".