240566 has 4 divisors (see below), whose sum is σ = 360852. Its totient is φ = 120282.

The previous prime is 240551. The next prime is 240571. The reversal of 240566 is 665042.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

240566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60140 + ... + 60143.

It is an arithmetic number, because the mean of its divisors is an integer number (90213).

2²⁴⁰⁵⁶⁶ is an apocalyptic number.

240566 is a deficient number, since it is larger than the sum of its proper divisors (120286).

240566 is a wasteful number, since it uses less digits than its factorization.

240566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120285.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 240566 is about 490.4752797033. The cubic root of 240566 is about 62.1934643657.

The spelling of 240566 in words is "two hundred forty thousand, five hundred sixty-six".