12855863 has 6 divisors (see below), whose sum is σ = 13154544. Its totient is φ = 12558276.

The previous prime is 12855851. The next prime is 12855877. The reversal of 12855863 is 36855821.

It is not a de Polignac number, because 12855863 - 2¹² = 12851767 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 (12855823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24320 + ... + 24842.

It is an arithmetic number, because the mean of its divisors is an integer number (2192424).

Almost surely, 2^12855863 is an apocalyptic number.

12855863 is a deficient number, since it is larger than the sum of its proper divisors (298681).

12855863 is an frugal number, since it uses more digits than its factorization.

12855863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 570 counting only the distinct ones).

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

The square root of 12855863 is about 3585.5073560097. The cubic root of 12855863 is about 234.2612260353.

The spelling of 12855863 in words is "twelve million, eight hundred fifty-five thousand, eight hundred sixty-three".