581959 has 4 divisors (see below), whose sum is σ = 665104. Its totient is φ = 498816.

The previous prime is 581953. The next prime is 581981. The reversal of 581959 is 959185.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959185 = 5 ⋅191837.

It is a cyclic number.

It is not a de Polignac number, because 581959 - 2⁹ = 581447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581953) 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, 41562 + ... + 41575.

It is an arithmetic number, because the mean of its divisors is an integer number (166276).

2⁵⁸¹⁹⁵⁹ is an apocalyptic number.

581959 is a deficient number, since it is larger than the sum of its proper divisors (83145).

581959 is an equidigital number, since it uses as much as digits as its factorization.

581959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83144.

The product of its digits is 16200, while the sum is 37.

The square root of 581959 is about 762.8623729088. The cubic root of 581959 is about 83.4892954832.

It can be divided in two parts, 581 and 959, that added together give a triangular number (1540 = T₅₅).

The spelling of 581959 in words is "five hundred eighty-one thousand, nine hundred fifty-nine".