243185 has 8 divisors (see below), whose sum is σ = 309096. Its totient is φ = 183040.

The previous prime is 243167. The next prime is 243197. The reversal of 243185 is 581342.

It can be written as a sum of positive squares in 4 ways, for example, as 55696 + 187489 = 236^2 + 433^2 .

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

It is not a de Polignac number, because 243185 - 2⁶ = 243121 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 243185.

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, 1346 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (38637).

2²⁴³¹⁸⁵ is an apocalyptic number.

It is an amenable number.

243185 is a deficient number, since it is larger than the sum of its proper divisors (65911).

243185 is a wasteful number, since it uses less digits than its factorization.

243185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its digits is 960, while the sum is 23.

The square root of 243185 is about 493.1379117448. The cubic root of 243185 is about 62.4183467036.

The spelling of 243185 in words is "two hundred forty-three thousand, one hundred eighty-five".