581287 has 6 divisors (see below), whose sum is σ = 676248. Its totient is φ = 498204.

The previous prime is 581263. The next prime is 581293. The reversal of 581287 is 782185.

It is not a de Polignac number, because 581287 - 2¹¹ = 579239 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 (581227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5883 + ... + 5980.

It is an arithmetic number, because the mean of its divisors is an integer number (112708).

2⁵⁸¹²⁸⁷ is an apocalyptic number.

581287 is a deficient number, since it is larger than the sum of its proper divisors (94961).

581287 is a wasteful number, since it uses less digits than its factorization.

581287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11877 (or 11870 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 581287 is about 762.4217992686. The cubic root of 581287 is about 83.4571475051.

It can be divided in two parts, 581 and 287, that added together give a palindrome (868).

The spelling of 581287 in words is "five hundred eighty-one thousand, two hundred eighty-seven".