12806138 has 8 divisors (see below), whose sum is σ = 19293780. Its totient is φ = 6374880.

The previous prime is 12806113. The next prime is 12806141. The reversal of 12806138 is 83160821.

It can be written as a sum of positive squares in 2 ways, for example, as 12623809 + 182329 = 3553^2 + 427^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12806138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13523 + ... + 14438.

Almost surely, 2^12806138 is an apocalyptic number.

12806138 is a deficient number, since it is larger than the sum of its proper divisors (6487642).

12806138 is a wasteful number, since it uses less digits than its factorization.

12806138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28192.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 12806138 is about 3578.5664727653. The cubic root of 12806138 is about 233.9588039588.

Adding to 12806138 its reverse (83160821), we get a palindrome (95966959).

The spelling of 12806138 in words is "twelve million, eight hundred six thousand, one hundred thirty-eight".