12288161 has 4 divisors (see below), whose sum is σ = 13011012. Its totient is φ = 11565312.

The previous prime is 12288137. The next prime is 12288169. The reversal of 12288161 is 16188221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16188221 = 7 ⋅2312603.

It can be written as a sum of positive squares in 2 ways, for example, as 9728161 + 2560000 = 3119^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 12288161 - 2⁶ = 12288097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12288169) 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, 361400 + ... + 361433.

It is an arithmetic number, because the mean of its divisors is an integer number (3252753).

Almost surely, 2^12288161 is an apocalyptic number.

It is an amenable number.

12288161 is a deficient number, since it is larger than the sum of its proper divisors (722851).

12288161 is an equidigital number, since it uses as much as digits as its factorization.

12288161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722850.

The product of its digits is 1536, while the sum is 29.

The square root of 12288161 is about 3505.4473323672. The cubic root of 12288161 is about 230.7609390667.

The spelling of 12288161 in words is "twelve million, two hundred eighty-eight thousand, one hundred sixty-one".