12225900 has 72 divisors (see below), whose sum is σ = 35872704. Its totient is φ = 3214400.

The previous prime is 12225887. The next prime is 12225901. The reversal of 12225900 is 952221.

It is not an unprimeable number, because it can be changed into a prime (12225901) 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 23 ways as a sum of consecutive naturals, for example, 24655 + ... + 25145.

It is an arithmetic number, because the mean of its divisors is an integer number (498232).

Almost surely, 2^12225900 is an apocalyptic number.

12225900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12225900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17936352).

12225900 is an abundant number, since it is smaller than the sum of its proper divisors (23646804).

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

12225900 is a wasteful number, since it uses less digits than its factorization.

12225900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 12225900 is about 3496.5554478658. Note that the first 3 decimals coincide. The cubic root of 12225900 is about 230.3705432297.

The spelling of 12225900 in words is "twelve million, two hundred twenty-five thousand, nine hundred".