12706309 has 16 divisors (see below), whose sum is σ = 16183296. Its totient is φ = 9687600.

The previous prime is 12706289. The next prime is 12706313. The reversal of 12706309 is 90360721.

It is a cyclic number.

It is not a de Polignac number, because 12706309 - 2⁵ = 12706277 is a prime.

It is a super-2 number, since 2×12706309² = 322900576806962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12706399) 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, 1864 + ... + 5374.

It is an arithmetic number, because the mean of its divisors is an integer number (1011456).

Almost surely, 2^12706309 is an apocalyptic number.

It is an amenable number.

12706309 is a deficient number, since it is larger than the sum of its proper divisors (3476987).

12706309 is a wasteful number, since it uses less digits than its factorization.

12706309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 12706309 is about 3564.5910003814. The cubic root of 12706309 is about 233.3492830367.

The spelling of 12706309 in words is "twelve million, seven hundred six thousand, three hundred nine".