12243161 has 4 divisors (see below), whose sum is σ = 13992192. Its totient is φ = 10494132.

The previous prime is 12243157. The next prime is 12243167. The reversal of 12243161 is 16134221.

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: 16134221 = 193 ⋅83597.

It is a cyclic number.

It is not a de Polignac number, because 12243161 - 2² = 12243157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12243167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874505 + ... + 874518.

It is an arithmetic number, because the mean of its divisors is an integer number (3498048).

Almost surely, 2^12243161 is an apocalyptic number.

It is an amenable number.

12243161 is a deficient number, since it is larger than the sum of its proper divisors (1749031).

12243161 is an equidigital number, since it uses as much as digits as its factorization.

12243161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749030.

The product of its digits is 288, while the sum is 20.

The square root of 12243161 is about 3499.0228636006. The cubic root of 12243161 is about 230.4789076052.

Adding to 12243161 its reverse (16134221), we get a palindrome (28377382).

The spelling of 12243161 in words is "twelve million, two hundred forty-three thousand, one hundred sixty-one".