2101986 has 24 divisors (see below), whose sum is σ = 4702464. Its totient is φ = 677880.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2101986 is 6891012.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1326 + ... + 2441.

It is an arithmetic number, because the mean of its divisors is an integer number (195936).

2^2101986 is an apocalyptic number.

2101986 is an abundant number, since it is smaller than the sum of its proper divisors (2600478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101986 is a wasteful number, since it uses less digits than its factorization.

2101986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806 (or 3803 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2101986 is about 1449.8227477868. The cubic root of 2101986 is about 128.0982725133.

Adding to 2101986 its reverse (6891012), we get a palindrome (8992998).

The spelling of 2101986 in words is "two million, one hundred one thousand, nine hundred eighty-six".