12656225 has 12 divisors (see below), whose sum is σ = 15753084. Its totient is φ = 10086720.

The previous prime is 12656221. The next prime is 12656227. The reversal of 12656225 is 52265621.

It can be written as a sum of positive squares in 6 ways, for example, as 3751969 + 8904256 = 1937^2 + 2984^2 .

It is not a de Polignac number, because 12656225 - 2² = 12656221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12656221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7127 + ... + 8723.

It is an arithmetic number, because the mean of its divisors is an integer number (1312757).

Almost surely, 2^12656225 is an apocalyptic number.

It is an amenable number.

12656225 is a deficient number, since it is larger than the sum of its proper divisors (3096859).

12656225 is a wasteful number, since it uses less digits than its factorization.

12656225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1919 counting only the distinct ones).

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

The square root of 12656225 is about 3557.5588540458. The cubic root of 12656225 is about 233.0422845029.

The spelling of 12656225 in words is "twelve million, six hundred fifty-six thousand, two hundred twenty-five".