12612217 has 2 divisors, whose sum is σ = 12612218. Its totient is φ = 12612216.

The previous prime is 12612203. The next prime is 12612221. The reversal of 12612217 is 71221621.

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., 12257001 + 355216 = 3501^2 + 596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12612217 is a prime.

It is not a weakly prime, because it can be changed into another prime (12612277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6306108 + 6306109.

It is an arithmetic number, because the mean of its divisors is an integer number (6306109).

Almost surely, 2^12612217 is an apocalyptic number.

It is an amenable number.

12612217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12612217 is an equidigital number, since it uses as much as digits as its factorization.

12612217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 12612217 is about 3551.3683278421. The cubic root of 12612217 is about 232.7718606632.

Adding to 12612217 its reverse (71221621), we get a palindrome (83833838).

The spelling of 12612217 in words is "twelve million, six hundred twelve thousand, two hundred seventeen".