12855859 has 4 divisors (see below), whose sum is σ = 13612104. Its totient is φ = 12099616.

The previous prime is 12855851. The next prime is 12855877. The reversal of 12855859 is 95855821.

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 12855859 - 2³ = 12855851 is a prime.

It is a super-2 number, since 2×12855859² = 330546221255762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12855851) 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, 378097 + ... + 378130.

It is an arithmetic number, because the mean of its divisors is an integer number (3403026).

Almost surely, 2^12855859 is an apocalyptic number.

12855859 is a deficient number, since it is larger than the sum of its proper divisors (756245).

12855859 is an equidigital number, since it uses as much as digits as its factorization.

12855859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756244.

The product of its digits is 144000, while the sum is 43.

The square root of 12855859 is about 3585.5067982086. The cubic root of 12855859 is about 234.2612017391.

The spelling of 12855859 in words is "twelve million, eight hundred fifty-five thousand, eight hundred fifty-nine".