12305213 has 2 divisors, whose sum is σ = 12305214. Its totient is φ = 12305212.

The previous prime is 12305197. The next prime is 12305221. The reversal of 12305213 is 31250321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12264004 + 41209 = 3502^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 12305213 - 2⁴ = 12305197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12305191 and 12305200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12305243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152606 + 6152607.

It is an arithmetic number, because the mean of its divisors is an integer number (6152607).

Almost surely, 2^12305213 is an apocalyptic number.

It is an amenable number.

12305213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12305213 is an equidigital number, since it uses as much as digits as its factorization.

12305213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12305213 is about 3507.8787037182. The cubic root of 12305213 is about 230.8676302902.

Adding to 12305213 its reverse (31250321), we get a palindrome (43555534).

The spelling of 12305213 in words is "twelve million, three hundred five thousand, two hundred thirteen".