2000861 has 4 divisors (see below), whose sum is σ = 2033724. Its totient is φ = 1968000.

The previous prime is 2000813. The next prime is 2000863. The reversal of 2000861 is 1680002.

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 164836 + 1836025 = 406^2 + 1355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16340 + ... + 16461.

It is an arithmetic number, because the mean of its divisors is an integer number (508431).

2^2000861 is an apocalyptic number.

It is an amenable number.

2000861 is a deficient number, since it is larger than the sum of its proper divisors (32863).

2000861 is an equidigital number, since it uses as much as digits as its factorization.

2000861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32862.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2000861 is about 1414.5179390874. The cubic root of 2000861 is about 126.0101822627.

Adding to 2000861 its reverse (1680002), we get a palindrome (3680863).

The spelling of 2000861 in words is "two million, eight hundred sixty-one", and thus it is an aban number.