113543 has 4 divisors (see below), whose sum is σ = 120240. Its totient is φ = 106848.

The previous prime is 113539. The next prime is 113557. The reversal of 113543 is 345311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113543 - 2² = 113539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 6679 = 113543 / (1 + 1 + 3 + 5 + 4 + 3).

It is a Duffinian number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113513) 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, 3323 + ... + 3356.

It is an arithmetic number, because the mean of its divisors is an integer number (30060).

2¹¹³⁵⁴³ is an apocalyptic number.

113543 is a deficient number, since it is larger than the sum of its proper divisors (6697).

113543 is an equidigital number, since it uses as much as digits as its factorization.

113543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696.

The product of its digits is 180, while the sum is 17.

The square root of 113543 is about 336.9614221243. The cubic root of 113543 is about 48.4231965397.

Subtracting from 113543 its sum of digits (17), we obtain a triangular number (113526 = T₄₇₆).

Adding to 113543 its reverse (345311), we get a palindrome (458854).

It can be divided in two parts, 113 and 543, that added together give a palindrome (656).

The spelling of 113543 in words is "one hundred thirteen thousand, five hundred forty-three".