11856005 has 16 divisors (see below), whose sum is σ = 16383360. Its totient is φ = 8068032.

The previous prime is 11856001. The next prime is 11856023. The reversal of 11856005 is 50065811.

11856005 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11856005 - 2² = 11856001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3647 + ... + 6083.

It is an arithmetic number, because the mean of its divisors is an integer number (1023960).

Almost surely, 2^11856005 is an apocalyptic number.

It is an amenable number.

11856005 is a deficient number, since it is larger than the sum of its proper divisors (4527355).

11856005 is a wasteful number, since it uses less digits than its factorization.

11856005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 11856005 is about 3443.2550007224. The cubic root of 11856005 is about 228.0234214679.

The spelling of 11856005 in words is "eleven million, eight hundred fifty-six thousand, five".