581320 has 16 divisors (see below), whose sum is σ = 1308060. Its totient is φ = 232512.

The previous prime is 581311. The next prime is 581323. The reversal of 581320 is 23185.

It is a happy number.

581320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 676 = 762^2 + 26^2 .

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (581323) 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, 7227 + ... + 7306.

2⁵⁸¹³²⁰ is an apocalyptic number.

It is an amenable number.

581320 is an abundant number, since it is smaller than the sum of its proper divisors (726740).

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

581320 is a wasteful number, since it uses less digits than its factorization.

581320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14544 (or 14540 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 581320 is about 762.4434405253. The cubic root of 581320 is about 83.4587267787.

It can be divided in two parts, 58 and 1320, that added together give a triangular number (1378 = T₅₂).

The spelling of 581320 in words is "five hundred eighty-one thousand, three hundred twenty".