2112805 has 16 divisors (see below), whose sum is σ = 2686464. Its totient is φ = 1592640.

The previous prime is 2112793. The next prime is 2112821. The reversal of 2112805 is 5082112.

It is a de Polignac number, because none of the positive numbers 2^k-2112805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6507 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (167904).

2^2112805 is an apocalyptic number.

It is an amenable number.

2112805 is a deficient number, since it is larger than the sum of its proper divisors (573659).

2112805 is a wasteful number, since it uses less digits than its factorization.

2112805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2112805 is about 1453.5491047777. The cubic root of 2112805 is about 128.3176720455.

Adding to 2112805 its reverse (5082112), we get a palindrome (7194917).

The spelling of 2112805 in words is "two million, one hundred twelve thousand, eight hundred five".