12866222 has 4 divisors (see below), whose sum is σ = 19299336. Its totient is φ = 6433110.

The previous prime is 12866219. The next prime is 12866261. The reversal of 12866222 is 22266821.

It is a semiprime because it is the product of two primes.

It is a congruent 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 as a sum of consecutive naturals, namely, 3216554 + ... + 3216557.

It is an arithmetic number, because the mean of its divisors is an integer number (4824834).

Almost surely, 2^12866222 is an apocalyptic number.

12866222 is a deficient number, since it is larger than the sum of its proper divisors (6433114).

12866222 is an equidigital number, since it uses as much as digits as its factorization.

12866222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6433113.

The product of its digits is 4608, while the sum is 29.

The square root of 12866222 is about 3586.9516305632. The cubic root of 12866222 is about 234.3241301627.

The spelling of 12866222 in words is "twelve million, eight hundred sixty-six thousand, two hundred twenty-two".