12001217 has 4 divisors (see below), whose sum is σ = 12632880. Its totient is φ = 11369556.

The previous prime is 12001211. The next prime is 12001261. The reversal of 12001217 is 71210021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71210021 = 43 ⋅1656047.

It is a cyclic number.

It is not a de Polignac number, because 12001217 - 2⁶ = 12001153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315803 + ... + 315840.

It is an arithmetic number, because the mean of its divisors is an integer number (3158220).

Almost surely, 2^12001217 is an apocalyptic number.

It is an amenable number.

12001217 is a deficient number, since it is larger than the sum of its proper divisors (631663).

12001217 is an equidigital number, since it uses as much as digits as its factorization.

12001217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631662.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 12001217 is about 3464.2772695037. The cubic root of 12001217 is about 228.9505877892.

Adding to 12001217 its reverse (71210021), we get a palindrome (83211238).

The spelling of 12001217 in words is "twelve million, one thousand, two hundred seventeen".