855443 has 4 divisors (see below), whose sum is σ = 864360. Its totient is φ = 846528.

The previous prime is 855431. The next prime is 855461. The reversal of 855443 is 344558.

855443 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, and also an emirpimes, since its reverse is a distinct semiprime: 344558 = 2 ⋅172279.

It is a cyclic number.

It is not a de Polignac number, because 855443 - 2⁴ = 855427 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (855143) 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, 4313 + ... + 4506.

It is an arithmetic number, because the mean of its divisors is an integer number (216090).

2⁸⁵⁵⁴⁴³ is an apocalyptic number.

855443 is a deficient number, since it is larger than the sum of its proper divisors (8917).

855443 is an equidigital number, since it uses as much as digits as its factorization.

855443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8916.

The product of its digits is 9600, while the sum is 29.

The square root of 855443 is about 924.9016163895. The cubic root of 855443 is about 94.9285889934.

The spelling of 855443 in words is "eight hundred fifty-five thousand, four hundred forty-three".