2028001 has 4 divisors (see below), whose sum is σ = 2033812. Its totient is φ = 2022192.

The previous prime is 2027959. The next prime is 2028017. The reversal of 2028001 is 1008202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1123600 + 904401 = 1060^2 + 951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028001 - 2⁷ = 2027873 is a prime.

It is a super-2 number, since 2×2028001² = 8225576112002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028101) 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 in 3 ways as a sum of consecutive naturals, for example, 2346 + ... + 3091.

It is an arithmetic number, because the mean of its divisors is an integer number (508453).

2^2028001 is an apocalyptic number.

It is an amenable number.

2028001 is a deficient number, since it is larger than the sum of its proper divisors (5811).

2028001 is an equidigital number, since it uses as much as digits as its factorization.

2028001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5810.

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

The square root of 2028001 is about 1424.0790006176. The cubic root of 2028001 is about 126.5773662667.

The spelling of 2028001 in words is "two million, twenty-eight thousand, one".