842842 has 32 divisors (see below), whose sum is σ = 1701504. Its totient is φ = 302400.

The previous prime is 842819. The next prime is 842857. The reversal of 842842 is 248248.

It is a self number, because there is not a number n which added to its sum of digits gives 842842.

It is an unprimeable 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 15 ways as a sum of consecutive naturals, for example, 1792 + ... + 2212.

It is an arithmetic number, because the mean of its divisors is an integer number (53172).

2⁸⁴²⁸⁴² is an apocalyptic number.

842842 is an abundant number, since it is smaller than the sum of its proper divisors (858662).

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

842842 is a wasteful number, since it uses less digits than its factorization.

842842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454.

The product of its digits is 4096, while the sum is 28.

The square root of 842842 is about 918.0642679029. The cubic root of 842842 is about 94.4601700330.

It can be divided in two parts, 84 and 2842, that added together give a triangular number (2926 = T₇₆).

The spelling of 842842 in words is "eight hundred forty-two thousand, eight hundred forty-two".