581139 has 12 divisors (see below), whose sum is σ = 904176. Its totient is φ = 357552.

The previous prime is 581137. The next prime is 581143. The reversal of 581139 is 931185.

581139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 581139 - 2¹ = 581137 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (581137) 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, 2367 + ... + 2600.

It is an arithmetic number, because the mean of its divisors is an integer number (75348).

2⁵⁸¹¹³⁹ is an apocalyptic number.

581139 is a deficient number, since it is larger than the sum of its proper divisors (323037).

581139 is a wasteful number, since it uses less digits than its factorization.

581139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986 (or 4983 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 581139 is about 762.3247339553. The cubic root of 581139 is about 83.4500639667.

The spelling of 581139 in words is "five hundred eighty-one thousand, one hundred thirty-nine".