12217849 has 16 divisors (see below), whose sum is σ = 14974848. Its totient is φ = 9729792.

The previous prime is 12217811. The next prime is 12217859. The reversal of 12217849 is 94871221.

It is a cyclic number.

It is not a de Polignac number, because 12217849 - 2¹⁷ = 12086777 is a prime.

Its product of digits (8064) is a multiple of the sum of its prime divisors (1344).

It is not an unprimeable number, because it can be changed into a prime (12217859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9259 + ... + 10495.

It is an arithmetic number, because the mean of its divisors is an integer number (935928).

Almost surely, 2^12217849 is an apocalyptic number.

It is an amenable number.

12217849 is a deficient number, since it is larger than the sum of its proper divisors (2756999).

12217849 is a wasteful number, since it uses less digits than its factorization.

12217849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344.

The product of its digits is 8064, while the sum is 34.

The square root of 12217849 is about 3495.4039823746. The cubic root of 12217849 is about 230.3199642535.

It can be divided in two parts, 122 and 17849, that added together give a palindrome (17971).

The spelling of 12217849 in words is "twelve million, two hundred seventeen thousand, eight hundred forty-nine".