581842 has 16 divisors (see below), whose sum is σ = 938520. Its totient is φ = 269568.

The previous prime is 581821. The next prime is 581843. The reversal of 581842 is 248185.

It can be written as a sum of positive squares in 4 ways, for example, as 546121 + 35721 = 739^2 + 189^2 .

It is a super-2 number, since 2×581842² = 677080225928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 581842.

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

581842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628 + ... + 3784.

2⁵⁸¹⁸⁴² is an apocalyptic number.

581842 is a deficient number, since it is larger than the sum of its proper divisors (356678).

581842 is a wasteful number, since it uses less digits than its factorization.

581842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its digits is 2560, while the sum is 28.

The square root of 581842 is about 762.7856841866. The cubic root of 581842 is about 83.4837000705.

The spelling of 581842 in words is "five hundred eighty-one thousand, eight hundred forty-two".