109105 has 4 divisors (see below), whose sum is σ = 130932. Its totient is φ = 87280.

The previous prime is 109103. The next prime is 109111. The reversal of 109105 is 501901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501901 = 83 ⋅6047.

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 57121 = 228^2 + 239^2 .

It is not a de Polignac number, because 109105 - 2¹ = 109103 is a prime.

It is a Duffinian number.

109105 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10906 + ... + 10915.

It is an arithmetic number, because the mean of its divisors is an integer number (32733).

2¹⁰⁹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

109105 is a deficient number, since it is larger than the sum of its proper divisors (21827).

109105 is an equidigital number, since it uses as much as digits as its factorization.

109105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21826.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 109105 is about 330.3104600221. The cubic root of 109105 is about 47.7838954168.

The spelling of 109105 in words is "one hundred nine thousand, one hundred five".