12218142 has 8 divisors (see below), whose sum is σ = 24436296. Its totient is φ = 4072712.

The previous prime is 12218119. The next prime is 12218153. The reversal of 12218142 is 24181221.

It is a sphenic number, since it is the product of 3 distinct primes.

12218142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018173 + ... + 1018184.

It is an arithmetic number, because the mean of its divisors is an integer number (3054537).

Almost surely, 2^12218142 is an apocalyptic number.

12218142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12218142 is a wasteful number, since it uses less digits than its factorization.

12218142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036362.

The product of its digits is 256, while the sum is 21.

The square root of 12218142 is about 3495.4458943030. The cubic root of 12218142 is about 230.3218053634.

Adding to 12218142 its reverse (24181221), we get a palindrome (36399363).

The spelling of 12218142 in words is "twelve million, two hundred eighteen thousand, one hundred forty-two".