2166841 has 4 divisors (see below), whose sum is σ = 2212992. Its totient is φ = 2120692.

The previous prime is 2166833. The next prime is 2166877. The reversal of 2166841 is 1486612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166841 - 2³ = 2166833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23005 + ... + 23098.

It is an arithmetic number, because the mean of its divisors is an integer number (553248).

2^2166841 is an apocalyptic number.

It is an amenable number.

2166841 is a deficient number, since it is larger than the sum of its proper divisors (46151).

2166841 is an equidigital number, since it uses as much as digits as its factorization.

2166841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46150.

The product of its digits is 2304, while the sum is 28.

The square root of 2166841 is about 1472.0193612857. The cubic root of 2166841 is about 129.4024050636.

The spelling of 2166841 in words is "two million, one hundred sixty-six thousand, eight hundred forty-one".