12217842 has 48 divisors (see below), whose sum is σ = 32585280. Its totient is φ = 3221856.

The previous prime is 12217811. The next prime is 12217859. The reversal of 12217842 is 24871221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2092 + ... + 5367.

It is an arithmetic number, because the mean of its divisors is an integer number (678860).

Almost surely, 2^12217842 is an apocalyptic number.

12217842 is an abundant number, since it is smaller than the sum of its proper divisors (20367438).

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

12217842 is a wasteful number, since it uses less digits than its factorization.

12217842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487 (or 7484 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12217842 is about 3495.4029810596. The cubic root of 12217842 is about 230.3199202676.

The spelling of 12217842 in words is "twelve million, two hundred seventeen thousand, eight hundred forty-two".