12081305 has 16 divisors (see below), whose sum is σ = 15532560. Its totient is φ = 8988672.

The previous prime is 12081299. The next prime is 12081319. The reversal of 12081305 is 50318021.

It can be written as a sum of positive squares in 8 ways, for example, as 737881 + 11343424 = 859^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 12081305 - 2⁶ = 12081241 is a prime.

It is an unprimeable number.

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, 6767 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (970785).

Almost surely, 2^12081305 is an apocalyptic number.

It is an amenable number.

12081305 is a deficient number, since it is larger than the sum of its proper divisors (3451255).

12081305 is a wasteful number, since it uses less digits than its factorization.

12081305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 12081305 is about 3475.8171701055. The cubic root of 12081305 is about 229.4587461823.

Adding to 12081305 its reverse (50318021), we get a palindrome (62399326).

The spelling of 12081305 in words is "twelve million, eighty-one thousand, three hundred five".