11985305 has 4 divisors (see below), whose sum is σ = 14382372. Its totient is φ = 9588240.

The previous prime is 11985301. The next prime is 11985307. The reversal of 11985305 is 50358911.

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 1364224 + 10621081 = 1168^2 + 3259^2 .

It is not a de Polignac number, because 11985305 - 2² = 11985301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11985301) by changing a digit.

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, 1198526 + ... + 1198535.

It is an arithmetic number, because the mean of its divisors is an integer number (3595593).

Almost surely, 2^11985305 is an apocalyptic number.

It is an amenable number.

11985305 is a deficient number, since it is larger than the sum of its proper divisors (2397067).

11985305 is an equidigital number, since it uses as much as digits as its factorization.

11985305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397066.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 11985305 is about 3461.9799248407. The cubic root of 11985305 is about 228.8493571388.

The spelling of 11985305 in words is "eleven million, nine hundred eighty-five thousand, three hundred five".