12768161 has 12 divisors (see below), whose sum is σ = 14978688. Its totient is φ = 10656912.

The previous prime is 12768157. The next prime is 12768169. The reversal of 12768161 is 16186721.

It is a happy number.

It is not a de Polignac number, because 12768161 - 2² = 12768157 is a prime.

It is a Duffinian number.

Its product of digits (4032) is a multiple of the sum of its prime factors (448).

It is not an unprimeable number, because it can be changed into a prime (12768169) 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 11 ways as a sum of consecutive naturals, for example, 64715 + ... + 64911.

It is an arithmetic number, because the mean of its divisors is an integer number (1248224).

Almost surely, 2^12768161 is an apocalyptic number.

It is an amenable number.

12768161 is a deficient number, since it is larger than the sum of its proper divisors (2210527).

12768161 is an frugal number, since it uses more digits than its factorization.

12768161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 251 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 12768161 is about 3573.2563580018. The cubic root of 12768161 is about 233.7273042679.

The spelling of 12768161 in words is "twelve million, seven hundred sixty-eight thousand, one hundred sixty-one".