12273218 has 8 divisors (see below), whose sum is σ = 19492812. Its totient is φ = 5775616.

The previous prime is 12273199. The next prime is 12273223. The reversal of 12273218 is 81237221.

It can be written as a sum of positive squares in 2 ways, for example, as 12271009 + 2209 = 3503^2 + 47^2 .

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

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 180455 + ... + 180522.

Almost surely, 2^12273218 is an apocalyptic number.

12273218 is a deficient number, since it is larger than the sum of its proper divisors (7219594).

12273218 is a wasteful number, since it uses less digits than its factorization.

12273218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360996.

The product of its digits is 1344, while the sum is 26.

The square root of 12273218 is about 3503.3152869817. The cubic root of 12273218 is about 230.6673622924.

The spelling of 12273218 in words is "twelve million, two hundred seventy-three thousand, two hundred eighteen".