12217764 has 72 divisors (see below), whose sum is σ = 32733568. Its totient is φ = 3525120.

The previous prime is 12217759. The next prime is 12217769. The reversal of 12217764 is 46771221.

It is an interprime number because it is at equal distance from previous prime (12217759) and next prime (12217769).

It is not an unprimeable number, because it can be changed into a prime (12217769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44949 + ... + 45219.

Almost surely, 2^12217764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12217764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16366784).

12217764 is an abundant number, since it is smaller than the sum of its proper divisors (20515804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12217764 is a wasteful number, since it uses less digits than its factorization.

12217764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 306 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 12217764 is about 3495.3918235299. The cubic root of 12217764 is about 230.3194301376.

Adding to 12217764 its reverse (46771221), we get a palindrome (58988985).

The spelling of 12217764 in words is "twelve million, two hundred seventeen thousand, seven hundred sixty-four".