10543 has 4 divisors (see below), whose sum is σ = 11368. Its totient is φ = 9720.

The previous prime is 10531. The next prime is 10559. The reversal of 10543 is 34501.

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 10543 - 2¹³ = 2351 is a prime.

It is a super-2 number, since 2×10543² = 222309698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 811 = 10543 / (1 + 0 + 5 + 4 + 3).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10513) 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, 393 + ... + 418.

It is an arithmetic number, because the mean of its divisors is an integer number (2842).

2¹⁰⁵⁴³ is an apocalyptic number.

10543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10543 is a deficient number, since it is larger than the sum of its proper divisors (825).

10543 is an equidigital number, since it uses as much as digits as its factorization.

10543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 10543 is about 102.6791117998. The cubic root of 10543 is about 21.9274469432.

The spelling of 10543 in words is "ten thousand, five hundred forty-three".