581381 has 8 divisors (see below), whose sum is σ = 629280. Its totient is φ = 535248.

The previous prime is 581377. The next prime is 581393. The reversal of 581381 is 183185.

581381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 581381 - 2² = 581377 is a prime.

It is a super-2 number, since 2×581381² = 676007734322, which contains 22 as substring.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 581381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290 + ... + 1116.

It is an arithmetic number, because the mean of its divisors is an integer number (78660).

2⁵⁸¹³⁸¹ is an apocalyptic number.

It is an amenable number.

581381 is a deficient number, since it is larger than the sum of its proper divisors (47899).

581381 is a wasteful number, since it uses less digits than its factorization.

581381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883.

The product of its digits is 960, while the sum is 26.

The square root of 581381 is about 762.4834424432. The cubic root of 581381 is about 83.4616458848.

The spelling of 581381 in words is "five hundred eighty-one thousand, three hundred eighty-one".