12855555 has 24 divisors (see below), whose sum is σ = 23053680. Its totient is φ = 6619200.

The previous prime is 12855529. The next prime is 12855589. The reversal of 12855555 is 55555821.

It is not a de Polignac number, because 12855555 - 2¹⁵ = 12822787 is a prime.

12855555 is a modest number, since divided by 5555 gives 1285 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3621 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (960570).

Almost surely, 2^12855555 is an apocalyptic number.

12855555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12855555 is a deficient number, since it is larger than the sum of its proper divisors (10198125).

12855555 is a wasteful number, since it uses less digits than its factorization.

12855555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9891 (or 9888 counting only the distinct ones).

The product of its digits is 50000, while the sum is 36.

The square root of 12855555 is about 3585.4644050667. The cubic root of 12855555 is about 234.2593552149.

The spelling of 12855555 in words is "twelve million, eight hundred fifty-five thousand, five hundred fifty-five".