12255222 has 16 divisors (see below), whose sum is σ = 28012032. Its totient is φ = 3501480.

The previous prime is 12255179. The next prime is 12255227. The reversal of 12255222 is 22255221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12255227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145854 + ... + 145937.

It is an arithmetic number, because the mean of its divisors is an integer number (1750752).

Almost surely, 2^12255222 is an apocalyptic number.

12255222 is an abundant number, since it is smaller than the sum of its proper divisors (15756810).

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

12255222 is a wasteful number, since it uses less digits than its factorization.

12255222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291803.

The product of its digits is 800, while the sum is 21.

The square root of 12255222 is about 3500.7459205147. The cubic root of 12255222 is about 230.5545660017.

Subtracting 12255222 from its reverse (22255221), we obtain a palindrome (9999999).

The spelling of 12255222 in words is "twelve million, two hundred fifty-five thousand, two hundred twenty-two".