12218562 has 12 divisors (see below), whose sum is σ = 26473590. Its totient is φ = 4072848.

The previous prime is 12218537. The next prime is 12218587. The reversal of 12218562 is 26581221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12218537) and next prime (12218587).

It can be written as a sum of positive squares in only one way, i.e., 8946081 + 3272481 = 2991^2 + 1809^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339387 + ... + 339422.

Almost surely, 2^12218562 is an apocalyptic number.

12218562 is an abundant number, since it is smaller than the sum of its proper divisors (14255028).

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

12218562 is a wasteful number, since it uses less digits than its factorization.

12218562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678817 (or 678814 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 12218562 is about 3495.5059719589. The cubic root of 12218562 is about 230.3244444458.

Adding to 12218562 its reverse (26581221), we get a palindrome (38799783).

The spelling of 12218562 in words is "twelve million, two hundred eighteen thousand, five hundred sixty-two".