12856225 has 6 divisors (see below), whose sum is σ = 15941750. Its totient is φ = 10284960.

The previous prime is 12856219. The next prime is 12856231. The reversal of 12856225 is 52265821.

It is an interprime number because it is at equal distance from previous prime (12856219) and next prime (12856231).

It can be written as a sum of positive squares in 3 ways, for example, as 2692881 + 10163344 = 1641^2 + 3188^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12856225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 257100 + ... + 257149.

Almost surely, 2^12856225 is an apocalyptic number.

It is an amenable number.

12856225 is a deficient number, since it is larger than the sum of its proper divisors (3085525).

12856225 is an equidigital number, since it uses as much as digits as its factorization.

12856225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514259 (or 514254 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 12856225 is about 3585.5578366553. The cubic root of 12856225 is about 234.2634248185.

The spelling of 12856225 in words is "twelve million, eight hundred fifty-six thousand, two hundred twenty-five".