240641 has 2 divisors, whose sum is σ = 240642. Its totient is φ = 240640.

The previous prime is 240631. The next prime is 240659. The reversal of 240641 is 146042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 92416 = 385^2 + 304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240641 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120320 + 120321.

It is an arithmetic number, because the mean of its divisors is an integer number (120321).

It is a Proth number, since it is equal to 235 ⋅ 2¹⁰ + 1 and 235 < 2¹⁰.

2²⁴⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

240641 is a deficient number, since it is larger than the sum of its proper divisors (1).

240641 is an equidigital number, since it uses as much as digits as its factorization.

240641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 240641 is about 490.5517301977. The cubic root of 240641 is about 62.1999269375.

Adding to 240641 its reverse (146042), we get a palindrome (386683).

The spelling of 240641 in words is "two hundred forty thousand, six hundred forty-one".