2800001 has 2 divisors, whose sum is σ = 2800002. Its totient is φ = 2800000.

The previous prime is 2799991. The next prime is 2800003. The reversal of 2800001 is 1000082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 303601 = 1580^2 + 551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2800001 is a prime.

Together with 2800003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2800003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1400000 + 1400001.

It is an arithmetic number, because the mean of its divisors is an integer number (1400001).

2^2800001 is an apocalyptic number.

It is an amenable number.

2800001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2800001 is an equidigital number, since it uses as much as digits as its factorization.

2800001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2800001 is about 1673.3203518753. The cubic root of 2800001 is about 140.9459914206.

Adding to 2800001 its reverse (1000082), we get a palindrome (3800083).

The spelling of 2800001 in words is "two million, eight hundred thousand, one".