12222756 has 162 divisors, whose sum is σ = 39867282. Its totient is φ = 3144960.

The previous prime is 12222751. The next prime is 12222761. The reversal of 12222756 is 65722221.

It is an interprime number because it is at equal distance from previous prime (12222751) and next prime (12222761).

It can be written as a sum of positive squares in 3 ways, for example, as 933156 + 11289600 = 966^2 + 3360^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222751) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 298096 + ... + 298136.

Almost surely, 2^12222756 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 12222756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19933641).

12222756 is an abundant number, since it is smaller than the sum of its proper divisors (27644526).

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

12222756 is a wasteful number, since it uses less digits than its factorization.

12222756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 66 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 12222756 is about 3496.1058336383. The cubic root of 12222756 is about 230.3507942519.

Adding to 12222756 its reverse (65722221), we get a palindrome (77944977).

The spelling of 12222756 in words is "twelve million, two hundred twenty-two thousand, seven hundred fifty-six".