581373 has 12 divisors (see below), whose sum is σ = 904540. Its totient is φ = 357696.

The previous prime is 581369. The next prime is 581377. The reversal of 581373 is 373185.

It is an interprime number because it is at equal distance from previous prime (581369) and next prime (581377).

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 480249 = 318^2 + 693^2 .

It is not a de Polignac number, because 581373 - 2² = 581369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2368 + ... + 2601.

2⁵⁸¹³⁷³ is an apocalyptic number.

It is an amenable number.

581373 is a deficient number, since it is larger than the sum of its proper divisors (323167).

581373 is a wasteful number, since it uses less digits than its factorization.

581373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4988 (or 4985 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 581373 is about 762.4781964096. The cubic root of 581373 is about 83.4612630629.

It can be divided in two parts, 5813 and 73, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 581373 in words is "five hundred eighty-one thousand, three hundred seventy-three".