240289 has 4 divisors (see below), whose sum is σ = 274624. Its totient is φ = 205956.

The previous prime is 240287. The next prime is 240319. The reversal of 240289 is 982042.

240289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240289 - 2¹ = 240287 is a prime.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17157 + ... + 17170.

It is an arithmetic number, because the mean of its divisors is an integer number (68656).

2²⁴⁰²⁸⁹ is an apocalyptic number.

It is an amenable number.

240289 is a deficient number, since it is larger than the sum of its proper divisors (34335).

240289 is an equidigital number, since it uses as much as digits as its factorization.

240289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34334.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 240289 is about 490.1928192049. The cubic root of 240289 is about 62.1695842855.

It can be divided in two parts, 240 and 289, that added together give a square (529 = 23²).

The spelling of 240289 in words is "two hundred forty thousand, two hundred eighty-nine".