240685 has 8 divisors (see below), whose sum is σ = 296856. Its totient is φ = 187200.

The previous prime is 240677. The next prime is 240701. The reversal of 240685 is 586042.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 233289 = 86^2 + 483^2 .

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

It is not a de Polignac number, because 240685 - 2³ = 240677 is a prime.

It is a Duffinian number.

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, 466 + ... + 835.

It is an arithmetic number, because the mean of its divisors is an integer number (37107).

2²⁴⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

240685 is a deficient number, since it is larger than the sum of its proper divisors (56171).

240685 is a wasteful number, since it uses less digits than its factorization.

240685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 240685 is about 490.5965756097. The cubic root of 240685 is about 62.2037176881.

The spelling of 240685 in words is "two hundred forty thousand, six hundred eighty-five".