185105 has 4 divisors (see below), whose sum is σ = 222132. Its totient is φ = 148080.

The previous prime is 185099. The next prime is 185123. The reversal of 185105 is 501581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501581 = 19 ⋅26399.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 146689 = 196^2 + 383^2 .

It is not a de Polignac number, because 185105 - 2⁴ = 185089 is a prime.

It is a super-2 number, since 2×185105² = 68527722050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18506 + ... + 18515.

It is an arithmetic number, because the mean of its divisors is an integer number (55533).

2¹⁸⁵¹⁰⁵ is an apocalyptic number.

It is an amenable number.

185105 is a deficient number, since it is larger than the sum of its proper divisors (37027).

185105 is an equidigital number, since it uses as much as digits as its factorization.

185105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37026.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 185105 is about 430.2383060584. The cubic root of 185105 is about 56.9909701506.

Adding to 185105 its reverse (501581), we get a palindrome (686686).

The spelling of 185105 in words is "one hundred eighty-five thousand, one hundred five".