12210856 has 64 divisors (see below), whose sum is σ = 27705600. Its totient is φ = 4935168.

The previous prime is 12210853. The next prime is 12210857. The reversal of 12210856 is 65801221.

It is a self number, because there is not a number n which added to its sum of digits gives 12210856.

It is not an unprimeable number, because it can be changed into a prime (12210853) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 118501 + ... + 118603.

It is an arithmetic number, because the mean of its divisors is an integer number (432900).

Almost surely, 2^12210856 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 12210856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13852800).

12210856 is an abundant number, since it is smaller than the sum of its proper divisors (15494744).

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

12210856 is a wasteful number, since it uses less digits than its factorization.

12210856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12210856 is about 3494.4035256392. The cubic root of 12210856 is about 230.2760139397.

The spelling of 12210856 in words is "twelve million, two hundred ten thousand, eight hundred fifty-six".