12847855 has 4 divisors (see below), whose sum is σ = 15417432. Its totient is φ = 10278280.

The previous prime is 12847847. The next prime is 12847859. The reversal of 12847855 is 55874821.

12847855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12847855 - 2³ = 12847847 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12847859) 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, 1284781 + ... + 1284790.

It is an arithmetic number, because the mean of its divisors is an integer number (3854358).

Almost surely, 2^12847855 is an apocalyptic number.

12847855 is a deficient number, since it is larger than the sum of its proper divisors (2569577).

12847855 is an equidigital number, since it uses as much as digits as its factorization.

12847855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569576.

The product of its digits is 89600, while the sum is 40.

The square root of 12847855 is about 3584.3904642212. The cubic root of 12847855 is about 234.2125749892.

The spelling of 12847855 in words is "twelve million, eight hundred forty-seven thousand, eight hundred fifty-five".