2143859 has 2 divisors, whose sum is σ = 2143860. Its totient is φ = 2143858.

The previous prime is 2143847. The next prime is 2143861. The reversal of 2143859 is 9583412.

2143859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143859 is a prime.

It is a super-2 number, since 2×2143859² = 9192262823762, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2143861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2143829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071929 + 1071930.

It is an arithmetic number, because the mean of its divisors is an integer number (1071930).

2^2143859 is an apocalyptic number.

2143859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143859 is an equidigital number, since it uses as much as digits as its factorization.

2143859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 2143859 is about 1464.1922687953. The cubic root of 2143859 is about 128.9432877728.

The spelling of 2143859 in words is "two million, one hundred forty-three thousand, eight hundred fifty-nine".