663241 has 2 divisors, whose sum is σ = 663242. Its totient is φ = 663240.

The previous prime is 663239. The next prime is 663263. The reversal of 663241 is 142366.

663241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (663263) can be obtained adding 663241 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355216 + 308025 = 596^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 663241 - 2¹ = 663239 is a prime.

Together with 663239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (663281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331620 + 331621.

It is an arithmetic number, because the mean of its divisors is an integer number (331621).

2⁶⁶³²⁴¹ is an apocalyptic number.

It is an amenable number.

663241 is a deficient number, since it is larger than the sum of its proper divisors (1).

663241 is an equidigital number, since it uses as much as digits as its factorization.

663241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 663241 is about 814.3960952755. The cubic root of 663241 is about 87.2081596747.

The spelling of 663241 in words is "six hundred sixty-three thousand, two hundred forty-one".