2642891 has 2 divisors, whose sum is σ = 2642892. Its totient is φ = 2642890.

The previous prime is 2642879. The next prime is 2642897. The reversal of 2642891 is 1982462.

2642891 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-2642891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2642897) 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, 1321445 + 1321446.

It is an arithmetic number, because the mean of its divisors is an integer number (1321446).

2^2642891 is an apocalyptic number.

2642891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642891 is an equidigital number, since it uses as much as digits as its factorization.

2642891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 2642891 is about 1625.6970812547. The cubic root of 2642891 is about 138.2588957757.

The spelling of 2642891 in words is "two million, six hundred forty-two thousand, eight hundred ninety-one".