12220756 has 12 divisors (see below), whose sum is σ = 22644468. Its totient is φ = 5750912.

The previous prime is 12220721. The next prime is 12220757. The reversal of 12220756 is 65702221.

It can be written as a sum of positive squares in 2 ways, for example, as 4268356 + 7952400 = 2066^2 + 2820^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12220756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89791 + ... + 89926.

It is an arithmetic number, because the mean of its divisors is an integer number (1887039).

Almost surely, 2^12220756 is an apocalyptic number.

It is an amenable number.

12220756 is a deficient number, since it is larger than the sum of its proper divisors (10423712).

12220756 is a wasteful number, since it uses less digits than its factorization.

12220756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179738 (or 179736 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 12220756 is about 3495.8197894056. The cubic root of 12220756 is about 230.3382295265.

Adding to 12220756 its reverse (65702221), we get a palindrome (77922977).

The spelling of 12220756 in words is "twelve million, two hundred twenty thousand, seven hundred fifty-six".