12813559 has 4 divisors (see below), whose sum is σ = 13978440. Its totient is φ = 11648680.

The previous prime is 12813557. The next prime is 12813569. The reversal of 12813559 is 95531821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12813559 - 2¹ = 12813557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12813557) 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 3 ways as a sum of consecutive naturals, for example, 582424 + ... + 582445.

It is an arithmetic number, because the mean of its divisors is an integer number (3494610).

Almost surely, 2^12813559 is an apocalyptic number.

12813559 is a deficient number, since it is larger than the sum of its proper divisors (1164881).

12813559 is a wasteful number, since it uses less digits than its factorization.

12813559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164880.

The product of its digits is 10800, while the sum is 34.

The square root of 12813559 is about 3579.6031902992. The cubic root of 12813559 is about 234.0039873185.

The spelling of 12813559 in words is "twelve million, eight hundred thirteen thousand, five hundred fifty-nine".