581291 has 4 divisors (see below), whose sum is σ = 585672. Its totient is φ = 576912.

The previous prime is 581263. The next prime is 581293. The reversal of 581291 is 192185.

It is a happy number.

581291 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 581291 - 2⁶ = 581227 is a prime.

It is a super-3 number, since 3×581291³ = 589253338129875513, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 581291.

It is not an unprimeable number, because it can be changed into a prime (581293) 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, 1985 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (146418).

2⁵⁸¹²⁹¹ is an apocalyptic number.

581291 is a deficient number, since it is larger than the sum of its proper divisors (4381).

581291 is a wasteful number, since it uses less digits than its factorization.

581291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380.

The product of its digits is 720, while the sum is 26.

The square root of 581291 is about 762.4244224840. The cubic root of 581291 is about 83.4573389354.

It can be divided in two parts, 581 and 291, that multiplied together give a triangular number (169071 = T₅₈₁).

The spelling of 581291 in words is "five hundred eighty-one thousand, two hundred ninety-one".