2110861 has 2 divisors, whose sum is σ = 2110862. Its totient is φ = 2110860.

The previous prime is 2110859. The next prime is 2110877. The reversal of 2110861 is 1680112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 164836 = 1395^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110861 - 2¹ = 2110859 is a prime.

It is a super-2 number, since 2×2110861² = 8911468322642, which contains 22 as substring.

Together with 2110859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055430 + 1055431.

It is an arithmetic number, because the mean of its divisors is an integer number (1055431).

2^2110861 is an apocalyptic number.

It is an amenable number.

2110861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110861 is an equidigital number, since it uses as much as digits as its factorization.

2110861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2110861 is about 1452.8802428280. The cubic root of 2110861 is about 128.2783047746.

Adding to 2110861 its reverse (1680112), we get a palindrome (3790973).

The spelling of 2110861 in words is "two million, one hundred ten thousand, eight hundred sixty-one".