2185385 has 4 divisors (see below), whose sum is σ = 2622468. Its totient is φ = 1748304.

The previous prime is 2185373. The next prime is 2185387. The reversal of 2185385 is 5835812.

It is a happy number.

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 1373584 + 811801 = 1172^2 + 901^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185385 - 2⁴ = 2185369 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 (2185387) 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, 218534 + ... + 218543.

It is an arithmetic number, because the mean of its divisors is an integer number (655617).

2^2185385 is an apocalyptic number.

It is an amenable number.

2185385 is a deficient number, since it is larger than the sum of its proper divisors (437083).

2185385 is an equidigital number, since it uses as much as digits as its factorization.

2185385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437082.

The product of its digits is 9600, while the sum is 32.

The square root of 2185385 is about 1478.3047723660. The cubic root of 2185385 is about 129.7705023889.

The spelling of 2185385 in words is "two million, one hundred eighty-five thousand, three hundred eighty-five".