12855771 has 6 divisors (see below), whose sum is σ = 18569460. Its totient is φ = 8570508.

The previous prime is 12855767. The next prime is 12855797. The reversal of 12855771 is 17755821.

12855771 is a `hidden beast` number, since 1 + 2 + 85 + 577 + 1 = 666.

12855771 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12855771 - 2² = 12855767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12855721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714201 + ... + 714218.

It is an arithmetic number, because the mean of its divisors is an integer number (3094910).

Almost surely, 2^12855771 is an apocalyptic number.

12855771 is a deficient number, since it is larger than the sum of its proper divisors (5713689).

12855771 is a wasteful number, since it uses less digits than its factorization.

12855771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428425 (or 1428422 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 12855771 is about 3585.4945265612. The cubic root of 12855771 is about 234.2606672219.

It can be divided in two parts, 1285 and 5771, that added together give a square (7056 = 84²).

The spelling of 12855771 in words is "twelve million, eight hundred fifty-five thousand, seven hundred seventy-one".