855556 has 12 divisors (see below), whose sum is σ = 1612492. Its totient is φ = 394848.

The previous prime is 855527. The next prime is 855581. The reversal of 855556 is 655558.

It can be written as a sum of positive squares in 2 ways, for example, as 476100 + 379456 = 690^2 + 616^2 .

It is an unprimeable number.

855556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8175 + ... + 8278.

2⁸⁵⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

855556 is a deficient number, since it is larger than the sum of its proper divisors (756936).

855556 is a wasteful number, since it uses less digits than its factorization.

855556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16470 (or 16468 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The square root of 855556 is about 924.9627019507. The cubic root of 855556 is about 94.9327686829.

The spelling of 855556 in words is "eight hundred fifty-five thousand, five hundred fifty-six".