2820001 has 2 divisors, whose sum is σ = 2820002. Its totient is φ = 2820000.

The previous prime is 2819987. The next prime is 2820017. The reversal of 2820001 is 1000282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2808976 + 11025 = 1676^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820001 - 2⁹ = 2819489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2820031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410000 + 1410001.

It is an arithmetic number, because the mean of its divisors is an integer number (1410001).

2^2820001 is an apocalyptic number.

It is an amenable number.

2820001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820001 is an equidigital number, since it uses as much as digits as its factorization.

2820001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2820001 is about 1679.2858601203. The cubic root of 2820001 is about 141.2807811373.

Adding to 2820001 its reverse (1000282), we get a palindrome (3820283).

The spelling of 2820001 in words is "two million, eight hundred twenty thousand, one".