243243 has 48 divisors (see below), whose sum is σ = 489216. Its totient is φ = 116640.

The previous prime is 243239. The next prime is 243259. The reversal of 243243 is 342342.

It is not a de Polignac number, because 243243 - 2² = 243239 is a prime.

243243 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 243243.

It is not an unprimeable number, because it can be changed into a prime (243203) 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 47 ways as a sum of consecutive naturals, for example, 18705 + ... + 18717.

It is an arithmetic number, because the mean of its divisors is an integer number (10192).

2²⁴³²⁴³ is an apocalyptic number.

243243 is an abundant number, since it is smaller than the sum of its proper divisors (245973).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243243 is a wasteful number, since it uses less digits than its factorization.

243243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 34 counting only the distinct ones).

The product of its digits is 576, while the sum is 18.

The square root of 243243 is about 493.1967153175. The cubic root of 243243 is about 62.4233086000.

Adding to 243243 its reverse (342342), we get a palindrome (585585).

Subtracting 243243 from its reverse (342342), we obtain a palindrome (99099).

The spelling of 243243 in words is "two hundred forty-three thousand, two hundred forty-three", and thus it is an iban number.