240815 has 4 divisors (see below), whose sum is σ = 288984. Its totient is φ = 192648.

The previous prime is 240811. The next prime is 240829. The reversal of 240815 is 518042.

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

It is a cyclic number.

It is not a de Polignac number, because 240815 - 2² = 240811 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 (240811) 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, 24077 + ... + 24086.

It is an arithmetic number, because the mean of its divisors is an integer number (72246).

2²⁴⁰⁸¹⁵ is an apocalyptic number.

240815 is a deficient number, since it is larger than the sum of its proper divisors (48169).

240815 is an equidigital number, since it uses as much as digits as its factorization.

240815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48168.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 240815 is about 490.7290494764. The cubic root of 240815 is about 62.2149149346.

Adding to 240815 its reverse (518042), we get a palindrome (758857).

The spelling of 240815 in words is "two hundred forty thousand, eight hundred fifteen".