855841 has 4 divisors (see below), whose sum is σ = 978112. Its totient is φ = 733572.

The previous prime is 855821. The next prime is 855851. The reversal of 855841 is 148558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 148558 = 2 ⋅74279.

It is not a de Polignac number, because 855841 - 2⁷ = 855713 is a prime.

It is a Duffinian number.

855841 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (855821) 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, 61125 + ... + 61138.

It is an arithmetic number, because the mean of its divisors is an integer number (244528).

2⁸⁵⁵⁸⁴¹ is an apocalyptic number.

It is an amenable number.

855841 is a deficient number, since it is larger than the sum of its proper divisors (122271).

855841 is a wasteful number, since it uses less digits than its factorization.

855841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122270.

The product of its digits is 6400, while the sum is 31.

The square root of 855841 is about 925.1167493890. The cubic root of 855841 is about 94.9433087432.

The spelling of 855841 in words is "eight hundred fifty-five thousand, eight hundred forty-one".