12257213 has 2 divisors, whose sum is σ = 12257214. Its totient is φ = 12257212.

The previous prime is 12257173. The next prime is 12257233. The reversal of 12257213 is 31275221.

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., 6240004 + 6017209 = 2498^2 + 2453^2 .

It is an emirp because it is prime and its reverse (31275221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12257213 - 2¹² = 12253117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12257233) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128606 + 6128607.

It is an arithmetic number, because the mean of its divisors is an integer number (6128607).

Almost surely, 2^12257213 is an apocalyptic number.

It is an amenable number.

12257213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257213 is an equidigital number, since it uses as much as digits as its factorization.

12257213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 12257213 is about 3501.0302769328. The cubic root of 12257213 is about 230.5670507282.

The spelling of 12257213 in words is "twelve million, two hundred fifty-seven thousand, two hundred thirteen".