240857 has 4 divisors (see below), whose sum is σ = 243216. Its totient is φ = 238500.

The previous prime is 240853. The next prime is 240859. The reversal of 240857 is 758042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240857 - 2² = 240853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (60804).

2²⁴⁰⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

240857 is a deficient number, since it is larger than the sum of its proper divisors (2359).

240857 is a wasteful number, since it uses less digits than its factorization.

240857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 240857 is about 490.7718410830. The cubic root of 240857 is about 62.2185316452.

Adding to 240857 its reverse (758042), we get a palindrome (998899).

The spelling of 240857 in words is "two hundred forty thousand, eight hundred fifty-seven".