842999 has 4 divisors (see below), whose sum is σ = 845664. Its totient is φ = 840336.

The previous prime is 842993. The next prime is 843043. The reversal of 842999 is 999248.

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 842999 - 2¹⁶ = 777463 is a prime.

It is a Duffinian number.

842999 is a modest number, since divided by 999 gives 842 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (211416).

2⁸⁴²⁹⁹⁹ is an apocalyptic number.

842999 is a deficient number, since it is larger than the sum of its proper divisors (2665).

842999 is a wasteful number, since it uses less digits than its factorization.

842999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its digits is 46656, while the sum is 41.

The square root of 842999 is about 918.1497699177. The cubic root of 842999 is about 94.4660348435.

The spelling of 842999 in words is "eight hundred forty-two thousand, nine hundred ninety-nine".