2042891 has 2 divisors, whose sum is σ = 2042892. Its totient is φ = 2042890.

The previous prime is 2042863. The next prime is 2042923. The reversal of 2042891 is 1982402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2042891 - 2¹⁰ = 2041867 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2042891.

It is not a weakly prime, because it can be changed into another prime (2042851) 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, 1021445 + 1021446.

It is an arithmetic number, because the mean of its divisors is an integer number (1021446).

2^2042891 is an apocalyptic number.

2042891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042891 is an equidigital number, since it uses as much as digits as its factorization.

2042891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2042891 is about 1429.2973798339. The cubic root of 2042891 is about 126.8863968505.

The spelling of 2042891 in words is "two million, forty-two thousand, eight hundred ninety-one".