9842 has 16 divisors (see below), whose sum is σ = 18240. Its totient is φ = 3888.

The previous prime is 9839. The next prime is 9851. The reversal of 9842 is 2489.

9842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 3 and base 9.

It is a nialpdrome in base 10.

It is a zygodrome in base 6.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248 + ... + 284.

It is an arithmetic number, because the mean of its divisors is an integer number (1140).

2⁹⁸⁴² is an apocalyptic number.

9842 is a deficient number, since it is larger than the sum of its proper divisors (8398).

9842 is a wasteful number, since it uses less digits than its factorization.

9842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65.

The product of its digits is 576, while the sum is 23.

The square root of 9842 is about 99.2068546019. The cubic root of 9842 is about 21.4302771129.

The spelling of 9842 in words is "nine thousand, eight hundred forty-two".