12351217 has 2 divisors, whose sum is σ = 12351218. Its totient is φ = 12351216.

The previous prime is 12351203. The next prime is 12351221. The reversal of 12351217 is 71215321.

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., 9991921 + 2359296 = 3161^2 + 1536^2 .

It is an emirp because it is prime and its reverse (71215321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12351217 - 2¹⁹ = 11826929 is a prime.

It is a super-2 number, since 2×12351217² = 305105122762178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12351247) 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, 6175608 + 6175609.

It is an arithmetic number, because the mean of its divisors is an integer number (6175609).

Almost surely, 2^12351217 is an apocalyptic number.

It is an amenable number.

12351217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12351217 is an equidigital number, since it uses as much as digits as its factorization.

12351217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 22.

The square root of 12351217 is about 3514.4298257328. The cubic root of 12351217 is about 231.1549780531.

Adding to 12351217 its reverse (71215321), we get a palindrome (83566538).

The spelling of 12351217 in words is "twelve million, three hundred fifty-one thousand, two hundred seventeen".