42843 has 4 divisors (see below), whose sum is σ = 57128. Its totient is φ = 28560.

The previous prime is 42841. The next prime is 42853. The reversal of 42843 is 34824.

It is a happy number.

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

It is not a de Polignac number, because 42843 - 2¹ = 42841 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (42841) 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, 7138 + ... + 7143.

It is an arithmetic number, because the mean of its divisors is an integer number (14282).

2⁴²⁸⁴³ is an apocalyptic number.

42843 is a deficient number, since it is larger than the sum of its proper divisors (14285).

42843 is a wasteful number, since it uses less digits than its factorization.

42843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14284.

The product of its digits is 768, while the sum is 21.

The square root of 42843 is about 206.9855067390. The cubic root of 42843 is about 34.9912903498.

The spelling of 42843 in words is "forty-two thousand, eight hundred forty-three".