2821841 has 6 divisors (see below), whose sum is σ = 3101826. Its totient is φ = 2565200.

The previous prime is 2821831. The next prime is 2821849. The reversal of 2821841 is 1481282.

2821841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 450241 = 1540^2 + 671^2 .

It is not a de Polignac number, because 2821841 - 2¹⁰ = 2820817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2821841.

It is not an unprimeable number, because it can be changed into a prime (2821849) 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 in 5 ways as a sum of consecutive naturals, for example, 11540 + ... + 11781.

It is an arithmetic number, because the mean of its divisors is an integer number (516971).

2^2821841 is an apocalyptic number.

It is an amenable number.

2821841 is a deficient number, since it is larger than the sum of its proper divisors (279985).

2821841 is a wasteful number, since it uses less digits than its factorization.

2821841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23343 (or 23332 counting only the distinct ones).

The product of its digits is 1024, while the sum is 26.

The square root of 2821841 is about 1679.8336227139. The cubic root of 2821841 is about 141.3115021806.

The spelling of 2821841 in words is "two million, eight hundred twenty-one thousand, eight hundred forty-one".