243345 has 8 divisors (see below), whose sum is σ = 389376. Its totient is φ = 129776.

The previous prime is 243343. The next prime is 243367. The reversal of 243345 is 543342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243345 - 2¹ = 243343 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 4³ + 3⁴ + 3¹¹ + 4⁸ + 5 .

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (243343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8097 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (48672).

2²⁴³³⁴⁵ is an apocalyptic number.

It is an amenable number.

243345 is a deficient number, since it is larger than the sum of its proper divisors (146031).

243345 is a wasteful number, since it uses less digits than its factorization.

243345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16231.

The product of its digits is 1440, while the sum is 21.

The square root of 243345 is about 493.3001114940. The cubic root of 243345 is about 62.4320327808.

Adding to 243345 its reverse (543342), we get a palindrome (786687).

The spelling of 243345 in words is "two hundred forty-three thousand, three hundred forty-five".