240543 has 16 divisors (see below), whose sum is σ = 364800. Its totient is φ = 156600.

The previous prime is 240517. The next prime is 240551. The reversal of 240543 is 345042.

It is a happy number.

240543 is nontrivially palindromic in base 7.

It is not a de Polignac number, because 240543 - 2⁶ = 240479 is a prime.

240543 is a lucky number.

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 240543.

It is not an unprimeable number, because it can be changed into a prime (240503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1518 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (22800).

2²⁴⁰⁵⁴³ is an apocalyptic number.

240543 is a deficient number, since it is larger than the sum of its proper divisors (124257).

240543 is a wasteful number, since it uses less digits than its factorization.

240543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 240543 is about 490.4518324973. The cubic root of 240543 is about 62.1914822412.

Adding to 240543 its reverse (345042), we get a palindrome (585585).

The spelling of 240543 in words is "two hundred forty thousand, five hundred forty-three".