12045217 has 2 divisors, whose sum is σ = 12045218. Its totient is φ = 12045216.

The previous prime is 12045181. The next prime is 12045223. The reversal of 12045217 is 71254021.

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., 11806096 + 239121 = 3436^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 12045217 - 2¹⁵ = 12012449 is a prime.

It is not a weakly prime, because it can be changed into another prime (12045227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6022608 + 6022609.

It is an arithmetic number, because the mean of its divisors is an integer number (6022609).

Almost surely, 2^12045217 is an apocalyptic number.

It is an amenable number.

12045217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12045217 is an equidigital number, since it uses as much as digits as its factorization.

12045217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12045217 is about 3470.6219903643. The cubic root of 12045217 is about 229.2300466606.

Adding to 12045217 its reverse (71254021), we get a palindrome (83299238).

The spelling of 12045217 in words is "twelve million, forty-five thousand, two hundred seventeen".