240285 has 16 divisors (see below), whose sum is σ = 391104. Its totient is φ = 125952.

The previous prime is 240283. The next prime is 240287. The reversal of 240285 is 582042.

It is an interprime number because it is at equal distance from previous prime (240283) and next prime (240287).

It is not a de Polignac number, because 240285 - 2¹ = 240283 is a prime.

240285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240283) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1149 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (24444).

2²⁴⁰²⁸⁵ is an apocalyptic number.

It is an amenable number.

240285 is a deficient number, since it is larger than the sum of its proper divisors (150819).

240285 is a wasteful number, since it uses less digits than its factorization.

240285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 240285 is about 490.1887391607. The cubic root of 240285 is about 62.1692393124.

It can be divided in two parts, 240 and 285, that added together give a palindrome (525).

The spelling of 240285 in words is "two hundred forty thousand, two hundred eighty-five".