243385 has 4 divisors (see below), whose sum is σ = 292068. Its totient is φ = 194704.

The previous prime is 243367. The next prime is 243391. The reversal of 243385 is 583342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110889 + 132496 = 333^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 243385 - 2⁹ = 242873 is a prime.

It is a d-powerful number, because it can be written as 2¹⁶ + 4 + 3² + 3¹¹ + 8² + 5⁴ .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24334 + ... + 24343.

It is an arithmetic number, because the mean of its divisors is an integer number (73017).

2²⁴³³⁸⁵ is an apocalyptic number.

It is an amenable number.

243385 is a deficient number, since it is larger than the sum of its proper divisors (48683).

243385 is an equidigital number, since it uses as much as digits as its factorization.

243385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48682.

The product of its digits is 2880, while the sum is 25.

The square root of 243385 is about 493.3406530989. The cubic root of 243385 is about 62.4354533627.

The spelling of 243385 in words is "two hundred forty-three thousand, three hundred eighty-five".