243043 has 4 divisors (see below), whose sum is σ = 244080. Its totient is φ = 242008.

The previous prime is 243031. The next prime is 243073. The reversal of 243043 is 340342.

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 243043 - 2⁵ = 243011 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (243073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (61020).

2²⁴³⁰⁴³ is an apocalyptic number.

243043 is a deficient number, since it is larger than the sum of its proper divisors (1037).

243043 is an equidigital number, since it uses as much as digits as its factorization.

243043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 243043 is about 492.9939147697. The cubic root of 243043 is about 62.4061952812.

Adding to 243043 its reverse (340342), we get a palindrome (583385).

The spelling of 243043 in words is "two hundred forty-three thousand, forty-three", and thus it is an iban number.