11851885 has 4 divisors (see below), whose sum is σ = 14222268. Its totient is φ = 9481504.

The previous prime is 11851867. The next prime is 11851891. The reversal of 11851885 is 58815811.

11851885 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4866436 + 6985449 = 2206^2 + 2643^2 .

It is a cyclic number.

It is not a de Polignac number, because 11851885 - 2⁹ = 11851373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185184 + ... + 1185193.

It is an arithmetic number, because the mean of its divisors is an integer number (3555567).

Almost surely, 2^11851885 is an apocalyptic number.

It is an amenable number.

11851885 is a deficient number, since it is larger than the sum of its proper divisors (2370383).

11851885 is an equidigital number, since it uses as much as digits as its factorization.

11851885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370382.

The product of its digits is 12800, while the sum is 37.

The square root of 11851885 is about 3442.6566776256. The cubic root of 11851885 is about 227.9970054495.

It can be divided in two parts, 118 and 51885, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 11851885 in words is "eleven million, eight hundred fifty-one thousand, eight hundred eighty-five".