581841 has 12 divisors (see below), whose sum is σ = 905268. Its totient is φ = 357984.

The previous prime is 581821. The next prime is 581843. The reversal of 581841 is 148185.

581841 is a `hidden beast` number, since 581 + 84 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 360000 = 471^2 + 600^2 .

It is not a de Polignac number, because 581841 - 2⁵ = 581809 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (581843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2370 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (75439).

2⁵⁸¹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

581841 is a deficient number, since it is larger than the sum of its proper divisors (323427).

581841 is a wasteful number, since it uses less digits than its factorization.

581841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4992 (or 4989 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 581841 is about 762.7850286942. The cubic root of 581841 is about 83.4836522432.

It can be divided in two parts, 58184 and 1, that added together give a palindrome (58185).

The spelling of 581841 in words is "five hundred eighty-one thousand, eight hundred forty-one".