581005 has 4 divisors (see below), whose sum is σ = 697212. Its totient is φ = 464800.

The previous prime is 580997. The next prime is 581029. The reversal of 581005 is 500185.

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

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 385641 = 442^2 + 621^2 .

It is not a de Polignac number, because 581005 - 2³ = 580997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58096 + ... + 58105.

It is an arithmetic number, because the mean of its divisors is an integer number (174303).

2⁵⁸¹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

581005 is a deficient number, since it is larger than the sum of its proper divisors (116207).

581005 is a wasteful number, since it uses less digits than its factorization.

581005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116206.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 581005 is about 762.2368398339. The cubic root of 581005 is about 83.4436494554.

The spelling of 581005 in words is "five hundred eighty-one thousand, five".