2106881 has 8 divisors (see below), whose sum is σ = 2416704. Its totient is φ = 1799280.

The previous prime is 2106877. The next prime is 2106887. The reversal of 2106881 is 1886012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2106881 - 2² = 2106877 is a prime.

It is a super-2 number, since 2×2106881² = 8877895096322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2106881.

It is not an unprimeable number, because it can be changed into a prime (2106887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3131 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (302088).

2^2106881 is an apocalyptic number.

It is an amenable number.

2106881 is a deficient number, since it is larger than the sum of its proper divisors (309823).

2106881 is an equidigital number, since it uses as much as digits as its factorization.

2106881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2106881 is about 1451.5099035143. The cubic root of 2106881 is about 128.1976317118.

The spelling of 2106881 in words is "two million, one hundred six thousand, eight hundred eighty-one".