860581 has 2 divisors, whose sum is σ = 860582. Its totient is φ = 860580.

The previous prime is 860579. The next prime is 860593. The reversal of 860581 is 185068.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 320356 = 735^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 860581 - 2¹ = 860579 is a prime.

It is a super-2 number, since 2×860581² = 1481199315122, which contains 22 as substring.

Together with 860579, it forms a pair of twin primes.

860581 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430290 + 430291.

It is an arithmetic number, because the mean of its divisors is an integer number (430291).

2⁸⁶⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

860581 is a deficient number, since it is larger than the sum of its proper divisors (1).

860581 is an equidigital number, since it uses as much as digits as its factorization.

860581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 860581 is about 927.6750508664. The cubic root of 860581 is about 95.1182645316.

It can be divided in two parts, 860 and 581, that added together give a palindrome (1441).

The spelling of 860581 in words is "eight hundred sixty thousand, five hundred eighty-one".