855843 has 4 divisors (see below), whose sum is σ = 1141128. Its totient is φ = 570560.

The previous prime is 855821. The next prime is 855851. The reversal of 855843 is 348558.

It is a happy number.

855843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 855843 - 2⁹ = 855331 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (855863) 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, 142638 + ... + 142643.

It is an arithmetic number, because the mean of its divisors is an integer number (285282).

2⁸⁵⁵⁸⁴³ is an apocalyptic number.

855843 is a deficient number, since it is larger than the sum of its proper divisors (285285).

855843 is a wasteful number, since it uses less digits than its factorization.

855843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285284.

The product of its digits is 19200, while the sum is 33.

The square root of 855843 is about 925.1178303330. The cubic root of 855843 is about 94.9433827002.

The spelling of 855843 in words is "eight hundred fifty-five thousand, eight hundred forty-three".