2185879 has 4 divisors (see below), whose sum is σ = 2227176. Its totient is φ = 2144584.

The previous prime is 2185873. The next prime is 2185889. The reversal of 2185879 is 9785812.

2185879 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 is a cyclic number.

It is not a de Polignac number, because 2185879 - 2³ = 2185871 is a prime.

It is a Duffinian number.

2185879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185871) 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, 20569 + ... + 20674.

It is an arithmetic number, because the mean of its divisors is an integer number (556794).

2^2185879 is an apocalyptic number.

2185879 is a deficient number, since it is larger than the sum of its proper divisors (41297).

2185879 is an equidigital number, since it uses as much as digits as its factorization.

2185879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41296.

The product of its digits is 40320, while the sum is 40.

The square root of 2185879 is about 1478.4718461980. The cubic root of 2185879 is about 129.7802797353.

The spelling of 2185879 in words is "two million, one hundred eighty-five thousand, eight hundred seventy-nine".