2185859 has 4 divisors (see below), whose sum is σ = 2354016. Its totient is φ = 2017704.

The previous prime is 2185853. The next prime is 2185861. The reversal of 2185859 is 9585812.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2185859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185853) 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, 84059 + ... + 84084.

It is an arithmetic number, because the mean of its divisors is an integer number (588504).

2^2185859 is an apocalyptic number.

2185859 is a deficient number, since it is larger than the sum of its proper divisors (168157).

2185859 is a wasteful number, since it uses less digits than its factorization.

2185859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168156.

The product of its digits is 28800, while the sum is 38.

The square root of 2185859 is about 1478.4650824419. The cubic root of 2185859 is about 129.7798839199.

The spelling of 2185859 in words is "two million, one hundred eighty-five thousand, eight hundred fifty-nine".