12306805 has 16 divisors (see below), whose sum is σ = 16963200. Its totient is φ = 8396352.

The previous prime is 12306803. The next prime is 12306839. The reversal of 12306805 is 50860321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12306805 - 2¹ = 12306803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12306805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12306803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7171 + ... + 8719.

It is an arithmetic number, because the mean of its divisors is an integer number (1060200).

Almost surely, 2^12306805 is an apocalyptic number.

It is an amenable number.

12306805 is a deficient number, since it is larger than the sum of its proper divisors (4656395).

12306805 is a wasteful number, since it uses less digits than its factorization.

12306805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12306805 is about 3508.1056141456. The cubic root of 12306805 is about 230.8775861092.

The spelling of 12306805 in words is "twelve million, three hundred six thousand, eight hundred five".