2184661 has 4 divisors (see below), whose sum is σ = 2190892. Its totient is φ = 2178432.

The previous prime is 2184649. The next prime is 2184667. The reversal of 2184661 is 1664812.

2184661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1703025 + 481636 = 1305^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 2184661 - 2²¹ = 87509 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 (2184667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556 + ... + 3301.

It is an arithmetic number, because the mean of its divisors is an integer number (547723).

2^2184661 is an apocalyptic number.

It is an amenable number.

2184661 is a deficient number, since it is larger than the sum of its proper divisors (6231).

2184661 is an equidigital number, since it uses as much as digits as its factorization.

2184661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6230.

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

The square root of 2184661 is about 1478.0598770009. The cubic root of 2184661 is about 129.7561701742.

The spelling of 2184661 in words is "two million, one hundred eighty-four thousand, six hundred sixty-one".