2000857 has 4 divisors (see below), whose sum is σ = 2028340. Its totient is φ = 1973376.

The previous prime is 2000813. The next prime is 2000863. The reversal of 2000857 is 7580002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7580002 = 2 ⋅3790001.

It can be written as a sum of positive squares in 2 ways, for example, as 502681 + 1498176 = 709^2 + 1224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2000807) 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, 13632 + ... + 13777.

It is an arithmetic number, because the mean of its divisors is an integer number (507085).

2^2000857 is an apocalyptic number.

It is an amenable number.

2000857 is a deficient number, since it is larger than the sum of its proper divisors (27483).

2000857 is an equidigital number, since it uses as much as digits as its factorization.

2000857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27482.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 2000857 is about 1414.5165251774. The cubic root of 2000857 is about 126.0100982920.

Adding to 2000857 its reverse (7580002), we get a palindrome (9580859).

The spelling of 2000857 in words is "two million, eight hundred fifty-seven", and thus it is an aban number.