2105864 has 24 divisors (see below), whose sum is σ = 4102410. Its totient is φ = 1013376.

The previous prime is 2105863. The next prime is 2105881. The reversal of 2105864 is 4685012.

It can be written as a sum of positive squares in 3 ways, for example, as 1188100 + 917764 = 1090^2 + 958^2 .

It is not an unprimeable number, because it can be changed into a prime (2105863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6572 + ... + 6884.

2^2105864 is an apocalyptic number.

It is an amenable number.

2105864 is a deficient number, since it is larger than the sum of its proper divisors (1996546).

2105864 is a wasteful number, since it uses less digits than its factorization.

2105864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2105864 is about 1451.1595363708. The cubic root of 2105864 is about 128.1770012197.

The spelling of 2105864 in words is "two million, one hundred five thousand, eight hundred sixty-four".