240643 has 8 divisors (see below), whose sum is σ = 263088. Its totient is φ = 218784.

The previous prime is 240641. The next prime is 240659. The reversal of 240643 is 346042.

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 240643 - 2¹ = 240641 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 240643.

It is not an unprimeable number, because it can be changed into a prime (240641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1305 + ... + 1477.

It is an arithmetic number, because the mean of its divisors is an integer number (32886).

2²⁴⁰⁶⁴³ is an apocalyptic number.

240643 is a deficient number, since it is larger than the sum of its proper divisors (22445).

240643 is a wasteful number, since it uses less digits than its factorization.

240643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 240643 is about 490.5537687145. The cubic root of 240643 is about 62.2000992544.

Adding to 240643 its reverse (346042), we get a palindrome (586685).

The spelling of 240643 in words is "two hundred forty thousand, six hundred forty-three".