12906505 has 8 divisors (see below), whose sum is σ = 15525000. Its totient is φ = 10300416.

The previous prime is 12906497. The next prime is 12906511. The reversal of 12906505 is 50560921.

12906505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 32761 + 12873744 = 181^2 + 3588^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12906505 - 2³ = 12906497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630 + ... + 5119.

It is an arithmetic number, because the mean of its divisors is an integer number (1940625).

Almost surely, 2^12906505 is an apocalyptic number.

It is an amenable number.

12906505 is a deficient number, since it is larger than the sum of its proper divisors (2618495).

12906505 is an equidigital number, since it uses as much as digits as its factorization.

12906505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6203.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 12906505 is about 3592.5624559637. The cubic root of 12906505 is about 234.5684247415.

The spelling of 12906505 in words is "twelve million, nine hundred six thousand, five hundred five".