240591 has 16 divisors (see below), whose sum is σ = 358400. Its totient is φ = 142560.

The previous prime is 240589. The next prime is 240599. The reversal of 240591 is 195042.

It is not a de Polignac number, because 240591 - 2¹ = 240589 is a prime.

It is the 491-st Hogben number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240599) by changing a digit.

It is a nontrivial repunit in base 490.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110 + ... + 1308.

It is an arithmetic number, because the mean of its divisors is an integer number (22400).

2²⁴⁰⁵⁹¹ is an apocalyptic number.

240591 is a deficient number, since it is larger than the sum of its proper divisors (117809).

240591 is a wasteful number, since it uses less digits than its factorization.

240591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 240591 is about 490.5007645254. The cubic root of 240591 is about 62.1956187055.

The spelling of 240591 in words is "two hundred forty thousand, five hundred ninety-one".