12221825 has 36 divisors (see below), whose sum is σ = 19253232. Its totient is φ = 7610400.

The previous prime is 12221821. The next prime is 12221837. The reversal of 12221825 is 52812221.

It is not a de Polignac number, because 12221825 - 2² = 12221821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221825.

It is not an unprimeable number, because it can be changed into a prime (12221821) 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 35 ways as a sum of consecutive naturals, for example, 13022 + ... + 13928.

It is an arithmetic number, because the mean of its divisors is an integer number (534812).

Almost surely, 2^12221825 is an apocalyptic number.

It is an amenable number.

12221825 is a deficient number, since it is larger than the sum of its proper divisors (7031407).

12221825 is a wasteful number, since it uses less digits than its factorization.

12221825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 930 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 12221825 is about 3495.9726829596. The cubic root of 12221825 is about 230.3449455427.

The spelling of 12221825 in words is "twelve million, two hundred twenty-one thousand, eight hundred twenty-five".