128543 has 4 divisors (see below), whose sum is σ = 129408. Its totient is φ = 127680.

The previous prime is 128521. The next prime is 128549. The reversal of 128543 is 345821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128543 - 2⁸ = 128287 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128549) 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, 146 + ... + 527.

It is an arithmetic number, because the mean of its divisors is an integer number (32352).

2¹²⁸⁵⁴³ is an apocalyptic number.

128543 is a deficient number, since it is larger than the sum of its proper divisors (865).

128543 is an equidigital number, since it uses as much as digits as its factorization.

128543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its digits is 960, while the sum is 23.

The square root of 128543 is about 358.5289388599. The cubic root of 128543 is about 50.4680057449.

It can be divided in two parts, 1285 and 43, that multiplied together give a palindrome (55255).

The spelling of 128543 in words is "one hundred twenty-eight thousand, five hundred forty-three".