842847 has 4 divisors (see below), whose sum is σ = 1123800. Its totient is φ = 561896.

The previous prime is 842819. The next prime is 842857. The reversal of 842847 is 748248.

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

It is a cyclic number.

It is not a de Polignac number, because 842847 - 2¹² = 838751 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842847.

It is not an unprimeable number, because it can be changed into a prime (842857) 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 3 ways as a sum of consecutive naturals, for example, 140472 + ... + 140477.

It is an arithmetic number, because the mean of its divisors is an integer number (280950).

2⁸⁴²⁸⁴⁷ is an apocalyptic number.

842847 is a deficient number, since it is larger than the sum of its proper divisors (280953).

842847 is a wasteful number, since it uses less digits than its factorization.

842847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280952.

The product of its digits is 14336, while the sum is 33.

The square root of 842847 is about 918.0669910197. The cubic root of 842847 is about 94.4603568216.

The spelling of 842847 in words is "eight hundred forty-two thousand, eight hundred forty-seven".