2128001 has 2 divisors, whose sum is σ = 2128002. Its totient is φ = 2128000.

The previous prime is 2127997. The next prime is 2128031. The reversal of 2128001 is 1008212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157776 + 970225 = 1076^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128001 - 2² = 2127997 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 (2128031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064000 + 1064001.

It is an arithmetic number, because the mean of its divisors is an integer number (1064001).

2^2128001 is an apocalyptic number.

It is an amenable number.

2128001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128001 is an equidigital number, since it uses as much as digits as its factorization.

2128001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2128001 is about 1458.7669450601. The cubic root of 2128001 is about 128.6245719755.

The spelling of 2128001 in words is "two million, one hundred twenty-eight thousand, one".