635842 has 4 divisors (see below), whose sum is σ = 953766. Its totient is φ = 317920.

The previous prime is 635837. The next prime is 635849. The reversal of 635842 is 248536.

635842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 505521 + 130321 = 711^2 + 361^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 635842.

It is not an unprimeable number, because it can be changed into a prime (635849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158959 + ... + 158962.

2⁶³⁵⁸⁴² is an apocalyptic number.

635842 is a deficient number, since it is larger than the sum of its proper divisors (317924).

635842 is a wasteful number, since it uses less digits than its factorization.

635842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317923.

The product of its digits is 5760, while the sum is 28.

The square root of 635842 is about 797.3970152941. The cubic root of 635842 is about 85.9903540651.

It can be divided in two parts, 6358 and 42, that added together give a square (6400 = 80²).

The spelling of 635842 in words is "six hundred thirty-five thousand, eight hundred forty-two".