843842 has 8 divisors (see below), whose sum is σ = 1309500. Its totient is φ = 407344.

The previous prime is 843841. The next prime is 843881. The reversal of 843842 is 248348.

It can be written as a sum of positive squares in 2 ways, for example, as 811801 + 32041 = 901^2 + 179^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (843841) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7217 + ... + 7332.

2⁸⁴³⁸⁴² is an apocalyptic number.

843842 is a deficient number, since it is larger than the sum of its proper divisors (465658).

843842 is a wasteful number, since it uses less digits than its factorization.

843842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14580.

The product of its digits is 6144, while the sum is 29.

The square root of 843842 is about 918.6087306356. The cubic root of 843842 is about 94.4975130688.

The spelling of 843842 in words is "eight hundred forty-three thousand, eight hundred forty-two".