12838565 has 8 divisors (see below), whose sum is σ = 15548280. Its totient is φ = 10176192.

The previous prime is 12838559. The next prime is 12838571. The reversal of 12838565 is 56583821.

12838565 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12838559) and next prime (12838571).

It can be written as a sum of positive squares in 4 ways, for example, as 36481 + 12802084 = 191^2 + 3578^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12838565 - 2⁴ = 12838549 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11234 + ... + 12323.

It is an arithmetic number, because the mean of its divisors is an integer number (1943535).

Almost surely, 2^12838565 is an apocalyptic number.

It is an amenable number.

12838565 is a deficient number, since it is larger than the sum of its proper divisors (2709715).

12838565 is a wasteful number, since it uses less digits than its factorization.

12838565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23671.

The product of its digits is 57600, while the sum is 38.

The square root of 12838565 is about 3583.0943331149. The cubic root of 12838565 is about 234.1561100653.

The spelling of 12838565 in words is "twelve million, eight hundred thirty-eight thousand, five hundred sixty-five".