12608161 has 4 divisors (see below), whose sum is σ = 12615300. Its totient is φ = 12601024.

The previous prime is 12608143. The next prime is 12608171. The reversal of 12608161 is 16180621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16180621 = 1091 ⋅14831.

It can be written as a sum of positive squares in 2 ways, for example, as 4227136 + 8381025 = 2056^2 + 2895^2 .

It is a cyclic number.

It is not a de Polignac number, because 12608161 - 2¹³ = 12599969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12608171) 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, 1245 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (3153825).

Almost surely, 2^12608161 is an apocalyptic number.

It is an amenable number.

12608161 is a deficient number, since it is larger than the sum of its proper divisors (7139).

12608161 is an equidigital number, since it uses as much as digits as its factorization.

12608161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12608161 is about 3550.7972344250. The cubic root of 12608161 is about 232.7469053918.

Adding to 12608161 its reverse (16180621), we get a palindrome (28788782).

It can be divided in two parts, 12608 and 161, that added together give a square (12769 = 113²).

The spelling of 12608161 in words is "twelve million, six hundred eight thousand, one hundred sixty-one".