12809155 has 8 divisors (see below), whose sum is σ = 15901200. Its totient is φ = 9893856.

The previous prime is 12809149. The next prime is 12809191. The reversal of 12809155 is 55190821.

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 12809155 - 2¹¹ = 12807107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44025 + ... + 44314.

It is an arithmetic number, because the mean of its divisors is an integer number (1987650).

Almost surely, 2^12809155 is an apocalyptic number.

12809155 is a deficient number, since it is larger than the sum of its proper divisors (3092045).

12809155 is an equidigital number, since it uses as much as digits as its factorization.

12809155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88373.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 12809155 is about 3578.9879854506. The cubic root of 12809155 is about 233.9771753129.

Adding to 12809155 its reverse (55190821), we get a palindrome (67999976).

The spelling of 12809155 in words is "twelve million, eight hundred nine thousand, one hundred fifty-five".