2110681 has 4 divisors (see below), whose sum is σ = 2114100. Its totient is φ = 2107264.

The previous prime is 2110679. The next prime is 2110699. The reversal of 2110681 is 1860112.

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 1478656 + 632025 = 1216^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110681 - 2¹ = 2110679 is a prime.

It is a super-2 number, since 2×2110681² = 8909948567522, which contains 22 as substring.

It is a Duffinian number.

2110681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2110621) 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, 496 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (528525).

2^2110681 is an apocalyptic number.

It is an amenable number.

2110681 is a deficient number, since it is larger than the sum of its proper divisors (3419).

2110681 is an equidigital number, since it uses as much as digits as its factorization.

2110681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

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

The square root of 2110681 is about 1452.8182955896. The cubic root of 2110681 is about 128.2746584345.

Adding to 2110681 its reverse (1860112), we get a palindrome (3970793).

The spelling of 2110681 in words is "two million, one hundred ten thousand, six hundred eighty-one".