581264 has 20 divisors (see below), whose sum is σ = 1193004. Its totient is φ = 273408.

The previous prime is 581263. The next prime is 581293. The reversal of 581264 is 462185.

It can be written as a sum of positive squares in 2 ways, for example, as 211600 + 369664 = 460^2 + 608^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 581264.

It is not an unprimeable number, because it can be changed into a prime (581261) 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, 797 + ... + 1340.

2⁵⁸¹²⁶⁴ is an apocalyptic number.

It is an amenable number.

581264 is an abundant number, since it is smaller than the sum of its proper divisors (611740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

581264 is a wasteful number, since it uses less digits than its factorization.

581264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162 (or 2156 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 581264 is about 762.4067156053. The cubic root of 581264 is about 83.4560467638.

The spelling of 581264 in words is "five hundred eighty-one thousand, two hundred sixty-four".