12566245 has 4 divisors (see below), whose sum is σ = 15079500. Its totient is φ = 10052992.

The previous prime is 12566243. The next prime is 12566261. The reversal of 12566245 is 54266521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54266521 = 73 ⋅743377.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 2719201 = 3138^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 12566245 - 2¹ = 12566243 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256620 + ... + 1256629.

It is an arithmetic number, because the mean of its divisors is an integer number (3769875).

Almost surely, 2^12566245 is an apocalyptic number.

It is an amenable number.

12566245 is a deficient number, since it is larger than the sum of its proper divisors (2513255).

12566245 is an equidigital number, since it uses as much as digits as its factorization.

12566245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513254.

The product of its digits is 14400, while the sum is 31.

The square root of 12566245 is about 3544.8899841885. The cubic root of 12566245 is about 232.4886956388.

The spelling of 12566245 in words is "twelve million, five hundred sixty-six thousand, two hundred forty-five".