240613 has 4 divisors (see below), whose sum is σ = 248940. Its totient is φ = 232288.

The previous prime is 240607. The next prime is 240623. The reversal of 240613 is 316042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 40804 = 447^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 240613 - 2⁹ = 240101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240623) 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, 4120 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (62235).

2²⁴⁰⁶¹³ is an apocalyptic number.

It is an amenable number.

240613 is a deficient number, since it is larger than the sum of its proper divisors (8327).

240613 is an equidigital number, since it uses as much as digits as its factorization.

240613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 240613 is about 490.5231900736. The cubic root of 240613 is about 62.1975144011.

Adding to 240613 its reverse (316042), we get a palindrome (556655).

The spelling of 240613 in words is "two hundred forty thousand, six hundred thirteen".