12406217 has 2 divisors, whose sum is σ = 12406218. Its totient is φ = 12406216.

The previous prime is 12406213. The next prime is 12406253. The reversal of 12406217 is 71260421.

12406217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 163216 = 3499^2 + 404^2 .

It is an emirp because it is prime and its reverse (71260421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12406217 - 2² = 12406213 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12406192 and 12406201.

It is not a weakly prime, because it can be changed into another prime (12406213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6203108 + 6203109.

It is an arithmetic number, because the mean of its divisors is an integer number (6203109).

Almost surely, 2^12406217 is an apocalyptic number.

It is an amenable number.

12406217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12406217 is an equidigital number, since it uses as much as digits as its factorization.

12406217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12406217 is about 3522.2460163935. The cubic root of 12406217 is about 231.4975812481.

Adding to 12406217 its reverse (71260421), we get a palindrome (83666638).

The spelling of 12406217 in words is "twelve million, four hundred six thousand, two hundred seventeen".