12655222 has 4 divisors (see below), whose sum is σ = 18982836. Its totient is φ = 6327610.

The previous prime is 12655219. The next prime is 12655231. The reversal of 12655222 is 22255621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22255621 = 4289 ⋅5189.

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, 3163804 + ... + 3163807.

It is an arithmetic number, because the mean of its divisors is an integer number (4745709).

Almost surely, 2^12655222 is an apocalyptic number.

12655222 is a deficient number, since it is larger than the sum of its proper divisors (6327614).

12655222 is an equidigital number, since it uses as much as digits as its factorization.

12655222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327613.

The product of its digits is 2400, while the sum is 25.

The square root of 12655222 is about 3557.4178838028. The cubic root of 12655222 is about 233.0361281757.

The spelling of 12655222 in words is "twelve million, six hundred fifty-five thousand, two hundred twenty-two".