2113866 has 12 divisors (see below), whose sum is σ = 4580082. Its totient is φ = 704616.

The previous prime is 2113843. The next prime is 2113873. The reversal of 2113866 is 6683112.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 848241 = 1125^2 + 921^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58701 + ... + 58736.

2^2113866 is an apocalyptic number.

2113866 is an abundant number, since it is smaller than the sum of its proper divisors (2466216).

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

2113866 is a wasteful number, since it uses less digits than its factorization.

2113866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117445 (or 117442 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2113866 is about 1453.9140277197. The cubic root of 2113866 is about 128.3391478035.

Adding to 2113866 its reverse (6683112), we get a palindrome (8796978).

The spelling of 2113866 in words is "two million, one hundred thirteen thousand, eight hundred sixty-six".