12217284 has 24 divisors (see below), whose sum is σ = 31674720. Its totient is φ = 4072392.

The previous prime is 12217277. The next prime is 12217313. The reversal of 12217284 is 48271221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 56454 + ... + 56669.

It is an arithmetic number, because the mean of its divisors is an integer number (1319780).

Almost surely, 2^12217284 is an apocalyptic number.

It is an amenable number.

12217284 is an abundant number, since it is smaller than the sum of its proper divisors (19457436).

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

12217284 is a wasteful number, since it uses less digits than its factorization.

12217284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113136 (or 113128 counting only the distinct ones).

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

The square root of 12217284 is about 3495.3231610253. The cubic root of 12217284 is about 230.3164139072.

The spelling of 12217284 in words is "twelve million, two hundred seventeen thousand, two hundred eighty-four".