4046821 has 2 divisors, whose sum is σ = 4046822. Its totient is φ = 4046820.

The previous prime is 4046807. The next prime is 4046849. The reversal of 4046821 is 1286404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 474721 = 1890^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 4046821 - 2⁹ = 4046309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4046851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2023410 + 2023411.

It is an arithmetic number, because the mean of its divisors is an integer number (2023411).

Almost surely, 2^4046821 is an apocalyptic number.

It is an amenable number.

4046821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4046821 is an equidigital number, since it uses as much as digits as its factorization.

4046821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 4046821 is about 2011.6711957972. The cubic root of 4046821 is about 159.3570683914.

It can be divided in two parts, 404 and 6821, that added together give a square (7225 = 85²).

The spelling of 4046821 in words is "four million, forty-six thousand, eight hundred twenty-one".