135543 has 4 divisors (see below), whose sum is σ = 180728. Its totient is φ = 90360.

The previous prime is 135533. The next prime is 135559. The reversal of 135543 is 345531.

135543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 135543 - 2⁵ = 135511 is a prime.

It is a D-number.

It is a Duffinian number.

135543 is a lucky number.

It is a nialpdrome in base 12.

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 135543.

It is not an unprimeable number, because it can be changed into a prime (135533) 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, 22588 + ... + 22593.

It is an arithmetic number, because the mean of its divisors is an integer number (45182).

2¹³⁵⁵⁴³ is an apocalyptic number.

135543 is a deficient number, since it is larger than the sum of its proper divisors (45185).

135543 is an equidigital number, since it uses as much as digits as its factorization.

135543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45184.

The product of its digits is 900, while the sum is 21.

The square root of 135543 is about 368.1616492792. The cubic root of 135543 is about 51.3679654235.

The spelling of 135543 in words is "one hundred thirty-five thousand, five hundred forty-three".