12566825 has 12 divisors (see below), whose sum is σ = 16500060. Its totient is φ = 9461760.

The previous prime is 12566821. The next prime is 12566837. The reversal of 12566825 is 52866521.

It can be written as a sum of positive squares in 6 ways, for example, as 6889 + 12559936 = 83^2 + 3544^2 .

It is not a de Polignac number, because 12566825 - 2² = 12566821 is a prime.

It is a super-4 number, since 4×12566825⁴ (a number of 29 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12566821) 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 11 ways as a sum of consecutive naturals, for example, 14360 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (1375005).

Almost surely, 2^12566825 is an apocalyptic number.

It is an amenable number.

12566825 is a deficient number, since it is larger than the sum of its proper divisors (3933235).

12566825 is a wasteful number, since it uses less digits than its factorization.

12566825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29596 (or 29591 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 12566825 is about 3544.9717911431. The cubic root of 12566825 is about 232.4922724529.

The spelling of 12566825 in words is "twelve million, five hundred sixty-six thousand, eight hundred twenty-five".