243065 has 8 divisors (see below), whose sum is σ = 294408. Its totient is φ = 192640.

The previous prime is 243031. The next prime is 243073. The reversal of 243065 is 560342.

It can be written as a sum of positive squares in 4 ways, for example, as 89401 + 153664 = 299^2 + 392^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-243065 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243065.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725 + ... + 1005.

It is an arithmetic number, because the mean of its divisors is an integer number (36801).

2²⁴³⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

243065 is a deficient number, since it is larger than the sum of its proper divisors (51343).

243065 is a wasteful number, since it uses less digits than its factorization.

243065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 243065 is about 493.0162269135. The cubic root of 243065 is about 62.4080782058.

The spelling of 243065 in words is "two hundred forty-three thousand, sixty-five".