108581 has 4 divisors (see below), whose sum is σ = 118464. Its totient is φ = 98700.

The previous prime is 108571. The next prime is 108587. The reversal of 108581 is 185801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108581 - 2⁶ = 108517 is a prime.

It is a super-2 number, since 2×108581² = 23579667122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4925 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (29616).

2¹⁰⁸⁵⁸¹ is an apocalyptic number.

108581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108581 is a deficient number, since it is larger than the sum of its proper divisors (9883).

108581 is an equidigital number, since it uses as much as digits as its factorization.

108581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9882.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 108581 is about 329.5163121911. The cubic root of 108581 is about 47.7072751789.

The spelling of 108581 in words is "one hundred eight thousand, five hundred eighty-one".