8142843 has 4 divisors (see below), whose sum is σ = 10857128. Its totient is φ = 5428560.

The previous prime is 8142839. The next prime is 8142853. The reversal of 8142843 is 3482418.

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

It is not a de Polignac number, because 8142843 - 2² = 8142839 is a prime.

It is an Ulam number.

It is a Duffinian number.

8142843 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8142843.

It is not an unprimeable number, because it can be changed into a prime (8142803) 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, 1357138 + ... + 1357143.

It is an arithmetic number, because the mean of its divisors is an integer number (2714282).

Almost surely, 2^8142843 is an apocalyptic number.

8142843 is a deficient number, since it is larger than the sum of its proper divisors (2714285).

8142843 is a wasteful number, since it uses less digits than its factorization.

8142843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714284.

The product of its digits is 6144, while the sum is 30.

The square root of 8142843 is about 2853.5667155334. The cubic root of 8142843 is about 201.1833430212.

It can be divided in two parts, 81 and 42843, that added together give a palindrome (42924).

The spelling of 8142843 in words is "eight million, one hundred forty-two thousand, eight hundred forty-three".