12427161 has 4 divisors (see below), whose sum is σ = 16569552. Its totient is φ = 8284772.

The previous prime is 12427147. The next prime is 12427169. The reversal of 12427161 is 16172421.

12427161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 12427161 - 2⁶ = 12427097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12427169) 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, 2071191 + ... + 2071196.

It is an arithmetic number, because the mean of its divisors is an integer number (4142388).

Almost surely, 2^12427161 is an apocalyptic number.

It is an amenable number.

12427161 is a deficient number, since it is larger than the sum of its proper divisors (4142391).

12427161 is an equidigital number, since it uses as much as digits as its factorization.

12427161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142390.

The product of its digits is 672, while the sum is 24.

The square root of 12427161 is about 3525.2178656077. The cubic root of 12427161 is about 231.6277783237.

Adding to 12427161 its reverse (16172421), we get a palindrome (28599582).

The spelling of 12427161 in words is "twelve million, four hundred twenty-seven thousand, one hundred sixty-one".