108505 has 4 divisors (see below), whose sum is σ = 130212. Its totient is φ = 86800.

The previous prime is 108503. The next prime is 108517. The reversal of 108505 is 505801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505801 = 17 ⋅29753.

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 38809 = 264^2 + 197^2 .

It is not a de Polignac number, because 108505 - 2¹ = 108503 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (108503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10846 + ... + 10855.

It is an arithmetic number, because the mean of its divisors is an integer number (32553).

2¹⁰⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

108505 is a deficient number, since it is larger than the sum of its proper divisors (21707).

108505 is an equidigital number, since it uses as much as digits as its factorization.

108505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21706.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 108505 is about 329.4009714618. The cubic root of 108505 is about 47.6961418647.

It can be divided in two parts, 10 and 8505, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 108505 in words is "one hundred eight thousand, five hundred five".