2105847 has 6 divisors (see below), whose sum is σ = 3041792. Its totient is φ = 1403892.

The previous prime is 2105843. The next prime is 2105863. The reversal of 2105847 is 7485012.

It is not a de Polignac number, because 2105847 - 2² = 2105843 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 0 + 5⁹ + 8⁵ + 4⁴ + 7⁶ .

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 2105847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105843) 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, 116983 + ... + 117000.

2^2105847 is an apocalyptic number.

2105847 is a deficient number, since it is larger than the sum of its proper divisors (935945).

2105847 is a wasteful number, since it uses less digits than its factorization.

2105847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233989 (or 233986 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2105847 is about 1451.1536789741. The cubic root of 2105847 is about 128.1766563075.

The spelling of 2105847 in words is "two million, one hundred five thousand, eight hundred forty-seven".