12705161 has 12 divisors (see below), whose sum is σ = 15290820. Its totient is φ = 10513440.

The previous prime is 12705127. The next prime is 12705163. The reversal of 12705161 is 16150721.

12705161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7529536 + 5175625 = 2744^2 + 2275^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12705161 is a prime.

It is a super-2 number, since 2×12705161² = 322842232071842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12705163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3050 + ... + 5891.

It is an arithmetic number, because the mean of its divisors is an integer number (1274235).

Almost surely, 2^12705161 is an apocalyptic number.

It is an amenable number.

12705161 is a deficient number, since it is larger than the sum of its proper divisors (2585659).

12705161 is an equidigital number, since it uses as much as digits as its factorization.

12705161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984 (or 8977 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 12705161 is about 3564.4299684522. The cubic root of 12705161 is about 233.3422552144.

Adding to 12705161 its reverse (16150721), we get a palindrome (28855882).

The spelling of 12705161 in words is "twelve million, seven hundred five thousand, one hundred sixty-one".