240811 has 2 divisors, whose sum is σ = 240812. Its totient is φ = 240810.

The previous prime is 240797. The next prime is 240829. The reversal of 240811 is 118042.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240811 is a prime.

It is not a weakly prime, because it can be changed into another prime (240841) 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 as a sum of consecutive naturals, namely, 120405 + 120406.

It is an arithmetic number, because the mean of its divisors is an integer number (120406).

2²⁴⁰⁸¹¹ is an apocalyptic number.

240811 is a deficient number, since it is larger than the sum of its proper divisors (1).

240811 is an equidigital number, since it uses as much as digits as its factorization.

240811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 240811 is about 490.7249738907. The cubic root of 240811 is about 62.2145704640.

Adding to 240811 its reverse (118042), we get a palindrome (358853).

The spelling of 240811 in words is "two hundred forty thousand, eight hundred eleven".