634842 has 24 divisors (see below), whose sum is σ = 1481844. Its totient is φ = 195264.

The previous prime is 634841. The next prime is 634853. The reversal of 634842 is 248436.

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 12321 = 789^2 + 111^2 .

It is not an unprimeable number, because it can be changed into a prime (634841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1123 + ... + 1590.

2⁶³⁴⁸⁴² is an apocalyptic number.

634842 is an abundant number, since it is smaller than the sum of its proper divisors (847002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634842 is a wasteful number, since it uses less digits than its factorization.

634842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734 (or 2731 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 634842 is about 796.7697283406. The cubic root of 634842 is about 85.9452508932.

The spelling of 634842 in words is "six hundred thirty-four thousand, eight hundred forty-two".