2100987 has 12 divisors (see below), whose sum is σ = 3468400. Its totient is φ = 1200528.

The previous prime is 2100983. The next prime is 2100991. The reversal of 2100987 is 7890012.

2100987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2100983) and next prime (2100991).

It is not a de Polignac number, because 2100987 - 2² = 2100983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100987.

It is not an unprimeable number, because it can be changed into a prime (2100983) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 16612 + ... + 16737.

2^2100987 is an apocalyptic number.

2100987 is a deficient number, since it is larger than the sum of its proper divisors (1367413).

2100987 is a wasteful number, since it uses less digits than its factorization.

2100987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33362 (or 33359 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 2100987 is about 1449.4781819676. The cubic root of 2100987 is about 128.0779757634.

Adding to 2100987 its reverse (7890012), we get a palindrome (9990999).

The spelling of 2100987 in words is "two million, one hundred thousand, nine hundred eighty-seven".