8442143 has 4 divisors (see below), whose sum is σ = 8454888. Its totient is φ = 8429400.

The previous prime is 8442131. The next prime is 8442151. The reversal of 8442143 is 3412448.

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 8442143 - 2⁶ = 8442079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442043) 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, 5321 + ... + 6722.

It is an arithmetic number, because the mean of its divisors is an integer number (2113722).

Almost surely, 2^8442143 is an apocalyptic number.

8442143 is a deficient number, since it is larger than the sum of its proper divisors (12745).

8442143 is a wasteful number, since it uses less digits than its factorization.

8442143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12744.

The product of its digits is 3072, while the sum is 26.

The square root of 8442143 is about 2905.5366113680. The cubic root of 8442143 is about 203.6186567408.

The spelling of 8442143 in words is "eight million, four hundred forty-two thousand, one hundred forty-three".