12766161 has 4 divisors (see below), whose sum is σ = 17021552. Its totient is φ = 8510772.

The previous prime is 12766153. The next prime is 12766183. The reversal of 12766161 is 16166721.

12766161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16166721 = 3 ⋅5388907.

It is not a de Polignac number, because 12766161 - 2³ = 12766153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12766121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127691 + ... + 2127696.

It is an arithmetic number, because the mean of its divisors is an integer number (4255388).

Almost surely, 2^12766161 is an apocalyptic number.

It is an amenable number.

12766161 is a deficient number, since it is larger than the sum of its proper divisors (4255391).

12766161 is an equidigital number, since it uses as much as digits as its factorization.

12766161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255390.

The product of its digits is 3024, while the sum is 30.

The square root of 12766161 is about 3572.9764902669. The cubic root of 12766161 is about 233.7150999779.

The spelling of 12766161 in words is "twelve million, seven hundred sixty-six thousand, one hundred sixty-one".