12372161 has 4 divisors (see below), whose sum is σ = 12605652. Its totient is φ = 12138672.

The previous prime is 12372133. The next prime is 12372163. The reversal of 12372161 is 16127321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5612161 + 6760000 = 2369^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 12372161 - 2¹⁰ = 12371137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12372163) 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 3 ways as a sum of consecutive naturals, for example, 116666 + ... + 116771.

It is an arithmetic number, because the mean of its divisors is an integer number (3151413).

Almost surely, 2^12372161 is an apocalyptic number.

It is an amenable number.

12372161 is a deficient number, since it is larger than the sum of its proper divisors (233491).

12372161 is an equidigital number, since it uses as much as digits as its factorization.

12372161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233490.

The product of its digits is 504, while the sum is 23.

The square root of 12372161 is about 3517.4082788326. The cubic root of 12372161 is about 231.2855610275.

Adding to 12372161 its reverse (16127321), we get a palindrome (28499482).

The spelling of 12372161 in words is "twelve million, three hundred seventy-two thousand, one hundred sixty-one".