842538 has 8 divisors (see below), whose sum is σ = 1685088. Its totient is φ = 280844.

The previous prime is 842531. The next prime is 842551. The reversal of 842538 is 835248.

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

842538 is an admirable number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842538.

It is not an unprimeable number, because it can be changed into a prime (842531) by changing a digit.

842538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70206 + ... + 70217.

It is an arithmetic number, because the mean of its divisors is an integer number (210636).

2⁸⁴²⁵³⁸ is an apocalyptic number.

842538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

842538 is a wasteful number, since it uses less digits than its factorization.

842538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140428.

The product of its digits is 7680, while the sum is 30.

The square root of 842538 is about 917.8986872199. The cubic root of 842538 is about 94.4488118959.

The spelling of 842538 in words is "eight hundred forty-two thousand, five hundred thirty-eight".