12342009 has 4 divisors (see below), whose sum is σ = 16456016. Its totient is φ = 8228004.

The previous prime is 12341981. The next prime is 12342013. The reversal of 12342009 is 90024321.

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 not a de Polignac number, because 12342009 - 2⁸ = 12341753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12342049) 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, 2056999 + ... + 2057004.

It is an arithmetic number, because the mean of its divisors is an integer number (4114004).

Almost surely, 2^12342009 is an apocalyptic number.

It is an amenable number.

12342009 is a deficient number, since it is larger than the sum of its proper divisors (4114007).

12342009 is an equidigital number, since it uses as much as digits as its factorization.

12342009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114006.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12342009 is about 3513.1195539008. The cubic root of 12342009 is about 231.0975207139.

The spelling of 12342009 in words is "twelve million, three hundred forty-two thousand, nine".