12270217 has 2 divisors, whose sum is σ = 12270218. Its totient is φ = 12270216.

The previous prime is 12270197. The next prime is 12270221. The reversal of 12270217 is 71207221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11431161 + 839056 = 3381^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 12270217 - 2²³ = 3881609 is a prime.

It is not a weakly prime, because it can be changed into another prime (12270317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6135108 + 6135109.

It is an arithmetic number, because the mean of its divisors is an integer number (6135109).

Almost surely, 2^12270217 is an apocalyptic number.

It is an amenable number.

12270217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12270217 is an equidigital number, since it uses as much as digits as its factorization.

12270217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 12270217 is about 3502.8869522153. The cubic root of 12270217 is about 230.6485601281.

Adding to 12270217 its reverse (71207221), we get a palindrome (83477438).

The spelling of 12270217 in words is "twelve million, two hundred seventy thousand, two hundred seventeen".