2105858 has 16 divisors (see below), whose sum is σ = 3371544. Its totient is φ = 983040.

The previous prime is 2105843. The next prime is 2105863. The reversal of 2105858 is 8585012.

2105858 is nontrivially palindromic in base 4 and base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 2007889 + 97969 = 1417^2 + 313^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2105858.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8066 + ... + 8322.

2^2105858 is an apocalyptic number.

2105858 is a deficient number, since it is larger than the sum of its proper divisors (1265686).

2105858 is a wasteful number, since it uses less digits than its factorization.

2105858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2105858 is about 1451.1574690570. The cubic root of 2105858 is about 128.1768794862.

The spelling of 2105858 in words is "two million, one hundred five thousand, eight hundred fifty-eight".