12266217 has 12 divisors (see below), whose sum is σ = 18329220. Its totient is φ = 7895328.

The previous prime is 12266213. The next prime is 12266237. The reversal of 12266217 is 71266221.

12266217 is a `hidden beast` number, since 12 + 26 + 621 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6095961 + 6170256 = 2469^2 + 2484^2 .

It is not a de Polignac number, because 12266217 - 2² = 12266213 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12266213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23238 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (1527435).

Almost surely, 2^12266217 is an apocalyptic number.

It is an amenable number.

12266217 is a deficient number, since it is larger than the sum of its proper divisors (6063003).

12266217 is a wasteful number, since it uses less digits than its factorization.

12266217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47032 (or 47029 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12266217 is about 3502.3159480549. The cubic root of 12266217 is about 230.6234941625.

The spelling of 12266217 in words is "twelve million, two hundred sixty-six thousand, two hundred seventeen".