105543 has 10 divisors (see below), whose sum is σ = 157784. Its totient is φ = 70308.

The previous prime is 105541. The next prime is 105557. The reversal of 105543 is 345501.

It is not a de Polignac number, because 105543 - 2¹ = 105541 is a prime.

It is a super-2 number, since 2×105543² = 22278649698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 105543.

It is not an unprimeable number, because it can be changed into a prime (105541) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 571 + ... + 732.

2¹⁰⁵⁵⁴³ is an apocalyptic number.

105543 is a deficient number, since it is larger than the sum of its proper divisors (52241).

105543 is an equidigital number, since it uses as much as digits as its factorization.

105543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 105543 is about 324.8738216600. The cubic root of 105543 is about 47.2581240755.

The spelling of 105543 in words is "one hundred five thousand, five hundred forty-three".