240565 has 8 divisors (see below), whose sum is σ = 310968. Its totient is φ = 177600.

The previous prime is 240551. The next prime is 240571. The reversal of 240565 is 565042.

240565 = T₉₁ + T₉₂ + ... + T₁₂₉.

It can be written as a sum of positive squares in 4 ways, for example, as 1444 + 239121 = 38^2 + 489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240565 - 2⁷ = 240437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1786 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (38871).

2²⁴⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

240565 is a deficient number, since it is larger than the sum of its proper divisors (70403).

240565 is a wasteful number, since it uses less digits than its factorization.

240565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 240565 is about 490.4742602828. The cubic root of 240565 is about 62.1933781890.

The spelling of 240565 in words is "two hundred forty thousand, five hundred sixty-five".