855885 has 8 divisors (see below), whose sum is σ = 1369440. Its totient is φ = 456464.

The previous prime is 855863. The next prime is 855887. The reversal of 855885 is 588558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855885 - 2⁶ = 855821 is a prime.

855885 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 855885.

It is not an unprimeable number, because it can be changed into a prime (855887) 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 7 ways as a sum of consecutive naturals, for example, 28515 + ... + 28544.

It is an arithmetic number, because the mean of its divisors is an integer number (171180).

2⁸⁵⁵⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

855885 is a deficient number, since it is larger than the sum of its proper divisors (513555).

855885 is a wasteful number, since it uses less digits than its factorization.

855885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57067.

The product of its digits is 64000, while the sum is 39.

The square root of 855885 is about 925.1405298656. The cubic root of 855885 is about 94.9449357720.

The spelling of 855885 in words is "eight hundred fifty-five thousand, eight hundred eighty-five".