2143843 has 4 divisors (see below), whose sum is σ = 2308768. Its totient is φ = 1978920.

The previous prime is 2143837. The next prime is 2143847. The reversal of 2143843 is 3483412.

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 2143843 - 2⁹ = 2143331 is a prime.

It is a Duffinian number.

2143843 is a lucky number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2143847) 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, 82443 + ... + 82468.

It is an arithmetic number, because the mean of its divisors is an integer number (577192).

2^2143843 is an apocalyptic number.

2143843 is a deficient number, since it is larger than the sum of its proper divisors (164925).

2143843 is a wasteful number, since it uses less digits than its factorization.

2143843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164924.

The product of its digits is 2304, while the sum is 25.

The square root of 2143843 is about 1464.1868050218. The cubic root of 2143843 is about 128.9429669965.

The spelling of 2143843 in words is "two million, one hundred forty-three thousand, eight hundred forty-three".