2840143 has 4 divisors (see below), whose sum is σ = 2845800. Its totient is φ = 2834488.

The previous prime is 2840119. The next prime is 2840161. The reversal of 2840143 is 3410482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3410482 = 2 ⋅1705241.

It is a cyclic number.

It is not a de Polignac number, because 2840143 - 2¹³ = 2831951 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 (2840113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1993 + ... + 3106.

It is an arithmetic number, because the mean of its divisors is an integer number (711450).

2^2840143 is an apocalyptic number.

2840143 is a deficient number, since it is larger than the sum of its proper divisors (5657).

2840143 is an equidigital number, since it uses as much as digits as its factorization.

2840143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2840143 is about 1685.2723815455. The cubic root of 2840143 is about 141.6163518361.

The spelling of 2840143 in words is "two million, eight hundred forty thousand, one hundred forty-three".