2824781 has 2 divisors, whose sum is σ = 2824782. Its totient is φ = 2824780.

The previous prime is 2824733. The next prime is 2824793. The reversal of 2824781 is 1874282.

2824781 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 can be written as a sum of positive squares in only one way, i.e., 1755625 + 1069156 = 1325^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 2824781 - 2¹⁴ = 2808397 is a prime.

It is a super-2 number, since 2×2824781² = 15958775395922, which contains 22 as substring.

It is a Sophie Germain 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 (2824721) 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, 1412390 + 1412391.

It is an arithmetic number, because the mean of its divisors is an integer number (1412391).

2^2824781 is an apocalyptic number.

It is an amenable number.

2824781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2824781 is an equidigital number, since it uses as much as digits as its factorization.

2824781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 32.

The square root of 2824781 is about 1680.7084815637. The cubic root of 2824781 is about 141.3605613605.

The spelling of 2824781 in words is "two million, eight hundred twenty-four thousand, seven hundred eighty-one".