1812085 has 16 divisors (see below), whose sum is σ = 2426112. Its totient is φ = 1288000.

The previous prime is 1812073. The next prime is 1812089. The reversal of 1812085 is 5802181.

It is not a de Polignac number, because 1812085 - 2⁵ = 1812053 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 (1812089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2235 + ... + 2935.

It is an arithmetic number, because the mean of its divisors is an integer number (151632).

2^1812085 is an apocalyptic number.

It is an amenable number.

1812085 is a deficient number, since it is larger than the sum of its proper divisors (614027).

1812085 is a wasteful number, since it uses less digits than its factorization.

1812085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1812085 is about 1346.1370658295. The cubic root of 1812085 is about 121.9156677783.

The spelling of 1812085 in words is "one million, eight hundred twelve thousand, eighty-five".