12427009 has 16 divisors (see below), whose sum is σ = 14620032. Its totient is φ = 10343808.

The previous prime is 12426991. The next prime is 12427027. The reversal of 12427009 is 90072421.

It is an interprime number because it is at equal distance from previous prime (12426991) and next prime (12427027).

It is not a de Polignac number, because 12427009 - 2¹⁷ = 12295937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12427309) 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 15 ways as a sum of consecutive naturals, for example, 42267 + ... + 42559.

It is an arithmetic number, because the mean of its divisors is an integer number (913752).

Almost surely, 2^12427009 is an apocalyptic number.

It is an amenable number.

12427009 is a deficient number, since it is larger than the sum of its proper divisors (2193023).

12427009 is an equidigital number, since it uses as much as digits as its factorization.

12427009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456.

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

The square root of 12427009 is about 3525.1963065906. The cubic root of 12427009 is about 231.6268339523.

The spelling of 12427009 in words is "twelve million, four hundred twenty-seven thousand, nine".