240305 has 8 divisors (see below), whose sum is σ = 310632. Its totient is φ = 177408.

The previous prime is 240287. The next prime is 240319. The reversal of 240305 is 503042.

It can be written as a sum of positive squares in 4 ways, for example, as 3136 + 237169 = 56^2 + 487^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 240305 - 2⁸ = 240049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240305.

It is a congruent number.

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, 1784 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (38829).

2²⁴⁰³⁰⁵ is an apocalyptic number.

It is an amenable number.

240305 is a deficient number, since it is larger than the sum of its proper divisors (70327).

240305 is a wasteful number, since it uses less digits than its factorization.

240305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 240305 is about 490.2091390417. The cubic root of 240305 is about 62.1709641396.

Adding to 240305 its reverse (503042), we get a palindrome (743347).

It can be divided in two parts, 240 and 305, that added together give a palindrome (545).

The spelling of 240305 in words is "two hundred forty thousand, three hundred five".