12023217 has 24 divisors (see below), whose sum is σ = 17878016. Its totient is φ = 7783776.

The previous prime is 12023191. The next prime is 12023239. The reversal of 12023217 is 71232021.

It is not a de Polignac number, because 12023217 - 2⁶ = 12023153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12023217.

It is not an unprimeable number, because it can be changed into a prime (12023317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76503 + ... + 76659.

Almost surely, 2^12023217 is an apocalyptic number.

It is an amenable number.

12023217 is a deficient number, since it is larger than the sum of its proper divisors (5854799).

12023217 is a wasteful number, since it uses less digits than its factorization.

12023217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12023217 is about 3467.4510811257. The cubic root of 12023217 is about 229.0904024503.

Adding to 12023217 its reverse (71232021), we get a palindrome (83255238).

The spelling of 12023217 in words is "twelve million, twenty-three thousand, two hundred seventeen".