12809135 has 16 divisors (see below), whose sum is σ = 16341600. Its totient is φ = 9611136.

The previous prime is 12809131. The next prime is 12809149. The reversal of 12809135 is 53190821.

It is a cyclic number.

It is not a de Polignac number, because 12809135 - 2² = 12809131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12809098 and 12809107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12809131) 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, 9737 + ... + 10973.

It is an arithmetic number, because the mean of its divisors is an integer number (1021350).

Almost surely, 2^12809135 is an apocalyptic number.

12809135 is a deficient number, since it is larger than the sum of its proper divisors (3532465).

12809135 is a wasteful number, since it uses less digits than its factorization.

12809135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12809135 is about 3578.9851913636. The cubic root of 12809135 is about 233.9770535368.

Adding to 12809135 its reverse (53190821), we get a palindrome (65999956).

The spelling of 12809135 in words is "twelve million, eight hundred nine thousand, one hundred thirty-five".