12743161 has 4 divisors (see below), whose sum is σ = 12983652. Its totient is φ = 12502672.

The previous prime is 12743153. The next prime is 12743191. The reversal of 12743161 is 16134721.

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 3404025 + 9339136 = 1845^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 12743161 - 2³ = 12743153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12743111) 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, 120166 + ... + 120271.

It is an arithmetic number, because the mean of its divisors is an integer number (3245913).

Almost surely, 2^12743161 is an apocalyptic number.

It is an amenable number.

12743161 is a deficient number, since it is larger than the sum of its proper divisors (240491).

12743161 is an equidigital number, since it uses as much as digits as its factorization.

12743161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240490.

The product of its digits is 1008, while the sum is 25.

The square root of 12743161 is about 3569.7564342683. The cubic root of 12743161 is about 233.5746589391.

Adding to 12743161 its reverse (16134721), we get a palindrome (28877882).

The spelling of 12743161 in words is "twelve million, seven hundred forty-three thousand, one hundred sixty-one".