2826821 has 2 divisors, whose sum is σ = 2826822. Its totient is φ = 2826820.

The previous prime is 2826793. The next prime is 2826829. The reversal of 2826821 is 1286282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2356225 + 470596 = 1535^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2826821 - 2⁶ = 2826757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2826829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1413410 + 1413411.

It is an arithmetic number, because the mean of its divisors is an integer number (1413411).

2^2826821 is an apocalyptic number.

It is an amenable number.

2826821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2826821 is an equidigital number, since it uses as much as digits as its factorization.

2826821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 29.

The square root of 2826821 is about 1681.3152589565. The cubic root of 2826821 is about 141.3945824231.

The spelling of 2826821 in words is "two million, eight hundred twenty-six thousand, eight hundred twenty-one".