243285 has 24 divisors (see below), whose sum is σ = 454176. Its totient is φ = 110880.

The previous prime is 243263. The next prime is 243301. The reversal of 243285 is 582342.

It is not a de Polignac number, because 243285 - 2⁷ = 243157 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 570 + ... + 900.

It is an arithmetic number, because the mean of its divisors is an integer number (18924).

2²⁴³²⁸⁵ is an apocalyptic number.

It is an amenable number.

243285 is a deficient number, since it is larger than the sum of its proper divisors (210891).

243285 is a wasteful number, since it uses less digits than its factorization.

243285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 346 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 243285 is about 493.2392928387. The cubic root of 243285 is about 62.4269012051.

It can be divided in two parts, 243 and 285, that added together give a triangular number (528 = T₃₂).

The spelling of 243285 in words is "two hundred forty-three thousand, two hundred eighty-five".