11543 has 8 divisors (see below), whose sum is σ = 14112. Its totient is φ = 9216.

The previous prime is 11527. The next prime is 11549. The reversal of 11543 is 34511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11543 - 2⁴ = 11527 is a prime.

It is a nialpdrome in base 11.

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 11543.

It is not an unprimeable number, because it can be changed into a prime (11549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71 + ... + 167.

It is an arithmetic number, because the mean of its divisors is an integer number (1764).

2¹¹⁵⁴³ is an apocalyptic number.

11543 is a deficient number, since it is larger than the sum of its proper divisors (2569).

11543 is an equidigital number, since it uses as much as digits as its factorization.

11543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121.

The product of its digits is 60, while the sum is 14.

The square root of 11543 is about 107.4383544178. The cubic root of 11543 is about 22.5998851379.

The spelling of 11543 in words is "eleven thousand, five hundred forty-three".