12695906 has 16 divisors (see below), whose sum is σ = 20245464. Its totient is φ = 5950464.

The previous prime is 12695899. The next prime is 12695909. The reversal of 12695906 is 60959621.

It can be written as a sum of positive squares in 4 ways, for example, as 8755681 + 3940225 = 2959^2 + 1985^2 .

It is a super-2 number, since 2×12695906² = 322372058321672, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12695906.

It is not an unprimeable number, because it can be changed into a prime (12695909) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10046 + ... + 11238.

Almost surely, 2^12695906 is an apocalyptic number.

12695906 is a deficient number, since it is larger than the sum of its proper divisors (7549558).

12695906 is a wasteful number, since it uses less digits than its factorization.

12695906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 12695906 is about 3563.1314878910. The cubic root of 12695906 is about 233.2855825189.

The spelling of 12695906 in words is "twelve million, six hundred ninety-five thousand, nine hundred six".