241565 has 4 divisors (see below), whose sum is σ = 289884. Its totient is φ = 193248.

The previous prime is 241561. The next prime is 241567. The reversal of 241565 is 565142.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565142 = 2 ⋅282571.

It can be written as a sum of positive squares in 2 ways, for example, as 76729 + 164836 = 277^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 241565 - 2² = 241561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 241565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24152 + ... + 24161.

It is an arithmetic number, because the mean of its divisors is an integer number (72471).

2²⁴¹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

241565 is a deficient number, since it is larger than the sum of its proper divisors (48319).

241565 is an equidigital number, since it uses as much as digits as its factorization.

241565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48318.

The product of its digits is 1200, while the sum is 23.

The square root of 241565 is about 491.4926245632. The cubic root of 241565 is about 62.2794358724.

The spelling of 241565 in words is "two hundred forty-one thousand, five hundred sixty-five".