12406213 has 2 divisors, whose sum is σ = 12406214. Its totient is φ = 12406212.

The previous prime is 12406193. The next prime is 12406217. The reversal of 12406213 is 31260421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10381284 + 2024929 = 3222^2 + 1423^2 .

It is a cyclic number.

It is not a de Polignac number, because 12406213 - 2¹⁷ = 12275141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12406217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6203106 + 6203107.

It is an arithmetic number, because the mean of its divisors is an integer number (6203107).

Almost surely, 2^12406213 is an apocalyptic number.

It is an amenable number.

12406213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12406213 is an equidigital number, since it uses as much as digits as its factorization.

12406213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12406213 is about 3522.2454485740. The cubic root of 12406213 is about 231.4975563684.

Adding to 12406213 its reverse (31260421), we get a palindrome (43666634).

The spelling of 12406213 in words is "twelve million, four hundred six thousand, two hundred thirteen".