12218764 has 6 divisors (see below), whose sum is σ = 21382844. Its totient is φ = 6109380.

The previous prime is 12218761. The next prime is 12218777. The reversal of 12218764 is 46781221.

12218764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12218761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1527342 + ... + 1527349.

Almost surely, 2^12218764 is an apocalyptic number.

It is an amenable number.

12218764 is a deficient number, since it is larger than the sum of its proper divisors (9164080).

12218764 is a wasteful number, since it uses less digits than its factorization.

12218764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054695 (or 3054693 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 12218764 is about 3495.5348660827. The cubic root of 12218764 is about 230.3257136972.

Adding to 12218764 its reverse (46781221), we get a palindrome (58999985).

The spelling of 12218764 in words is "twelve million, two hundred eighteen thousand, seven hundred sixty-four".