8021801 has 2 divisors, whose sum is σ = 8021802. Its totient is φ = 8021800.

The previous prime is 8021791. The next prime is 8021821. The reversal of 8021801 is 1081208.

It is an a-pointer prime, because the next prime (8021821) can be obtained adding 8021801 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6370576 + 1651225 = 2524^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 8021801 - 2⁶ = 8021737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8021821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010900 + 4010901.

It is an arithmetic number, because the mean of its divisors is an integer number (4010901).

Almost surely, 2^8021801 is an apocalyptic number.

It is an amenable number.

8021801 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021801 is an equidigital number, since it uses as much as digits as its factorization.

8021801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 8021801 is about 2832.2784114560. The cubic root of 8021801 is about 200.1815102204.

The spelling of 8021801 in words is "eight million, twenty-one thousand, eight hundred one".