2081186 has 8 divisors (see below), whose sum is σ = 3134700. Its totient is φ = 1036288.

The previous prime is 2081171. The next prime is 2081237. The reversal of 2081186 is 6811802.

It can be written as a sum of positive squares in 2 ways, for example, as 2002225 + 78961 = 1415^2 + 281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 1511 + ... + 2538.

2^2081186 is an apocalyptic number.

2081186 is a deficient number, since it is larger than the sum of its proper divisors (1053514).

2081186 is a wasteful number, since it uses less digits than its factorization.

2081186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2081186 is about 1442.6316231110. The cubic root of 2081186 is about 127.6743430664.

Adding to 2081186 its reverse (6811802), we get a palindrome (8892988).

The spelling of 2081186 in words is "two million, eighty-one thousand, one hundred eighty-six".