12222456 has 64 divisors (see below), whose sum is σ = 33501600. Its totient is φ = 3698688.

The previous prime is 12222433. The next prime is 12222461. The reversal of 12222456 is 65422221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11316 + ... + 12348.

Almost surely, 2^12222456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12222456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16750800).

12222456 is an abundant number, since it is smaller than the sum of its proper divisors (21279144).

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

12222456 is a wasteful number, since it uses less digits than its factorization.

12222456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1084 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 12222456 is about 3496.0629284954. The cubic root of 12222456 is about 230.3489096305.

Adding to 12222456 its reverse (65422221), we get a palindrome (77644677).

It can be divided in two parts, 122 and 22456, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 12222456 in words is "twelve million, two hundred twenty-two thousand, four hundred fifty-six".