636242 has 8 divisors (see below), whose sum is σ = 1010556. Its totient is φ = 299392.

The previous prime is 636241. The next prime is 636247. The reversal of 636242 is 242636.

636242 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 579121 + 57121 = 761^2 + 239^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636242.

It is not an unprimeable number, because it can be changed into a prime (636241) 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, 9323 + ... + 9390.

2⁶³⁶²⁴² is an apocalyptic number.

636242 is a deficient number, since it is larger than the sum of its proper divisors (374314).

636242 is a wasteful number, since it uses less digits than its factorization.

636242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18732.

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

The square root of 636242 is about 797.6477919483. The cubic root of 636242 is about 86.0083820927.

Adding to 636242 its reverse (242636), we get a palindrome (878878).

It can be divided in two parts, 636 and 242, that added together give a palindrome (878).

The spelling of 636242 in words is "six hundred thirty-six thousand, two hundred forty-two".