12457213 has 2 divisors, whose sum is σ = 12457214. Its totient is φ = 12457212.

The previous prime is 12457189. The next prime is 12457219. The reversal of 12457213 is 31275421.

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., 9903609 + 2553604 = 3147^2 + 1598^2 .

It is an emirp because it is prime and its reverse (31275421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12457213 is a prime.

It is equal to p₈₁₆₁₀₉ and since 12457213 and 816109 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 (12457219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6228606 + 6228607.

It is an arithmetic number, because the mean of its divisors is an integer number (6228607).

Almost surely, 2^12457213 is an apocalyptic number.

It is an amenable number.

12457213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12457213 is an equidigital number, since it uses as much as digits as its factorization.

12457213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 12457213 is about 3529.4777234033. The cubic root of 12457213 is about 231.8143394235.

The spelling of 12457213 in words is "twelve million, four hundred fifty-seven thousand, two hundred thirteen".