663242 has 8 divisors (see below), whose sum is σ = 1013796. Its totient is φ = 325312.

The previous prime is 663241. The next prime is 663263. The reversal of 663242 is 242366.

663242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 534361 + 128881 = 731^2 + 359^2 .

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

It is not an unprimeable number, because it can be changed into a prime (663241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023 + ... + 3234.

2⁶⁶³²⁴² is an apocalyptic number.

663242 is a deficient number, since it is larger than the sum of its proper divisors (350554).

663242 is a wasteful number, since it uses less digits than its factorization.

663242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312.

The product of its digits is 1728, while the sum is 23.

The square root of 663242 is about 814.3967092271. The cubic root of 663242 is about 87.2082035040.

The spelling of 663242 in words is "six hundred sixty-three thousand, two hundred forty-two".