12566225 has 12 divisors (see below), whose sum is σ = 17808384. Its totient is φ = 8616720.

The previous prime is 12566207. The next prime is 12566227. The reversal of 12566225 is 52266521.

It is not a de Polignac number, because 12566225 - 2⁶ = 12566161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12566227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35729 + ... + 36078.

It is an arithmetic number, because the mean of its divisors is an integer number (1484032).

Almost surely, 2^12566225 is an apocalyptic number.

It is an amenable number.

12566225 is a deficient number, since it is larger than the sum of its proper divisors (5242159).

12566225 is an equidigital number, since it uses as much as digits as its factorization.

12566225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71824 (or 71819 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 12566225 is about 3544.8871632254. The cubic root of 12566225 is about 232.4885722984.

The spelling of 12566225 in words is "twelve million, five hundred sixty-six thousand, two hundred twenty-five".