12218582 has 4 divisors (see below), whose sum is σ = 18327876. Its totient is φ = 6109290.

The previous prime is 12218537. The next prime is 12218587. The reversal of 12218582 is 28581221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28581221 = 397 ⋅71993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218587) 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 as a sum of consecutive naturals, namely, 3054644 + ... + 3054647.

It is an arithmetic number, because the mean of its divisors is an integer number (4581969).

Almost surely, 2^12218582 is an apocalyptic number.

12218582 is a deficient number, since it is larger than the sum of its proper divisors (6109294).

12218582 is an equidigital number, since it uses as much as digits as its factorization.

12218582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109293.

The product of its digits is 2560, while the sum is 29.

The square root of 12218582 is about 3495.5088327738. The cubic root of 12218582 is about 230.3245701149.

The spelling of 12218582 in words is "twelve million, two hundred eighteen thousand, five hundred eighty-two".