12102009 has 8 divisors (see below), whose sum is σ = 16377120. Its totient is φ = 7947456.

The previous prime is 12102001. The next prime is 12102017. The reversal of 12102009 is 90020121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12102001) and next prime (12102017).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12102009 - 2³ = 12102001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12102001) 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 7 ways as a sum of consecutive naturals, for example, 29904 + ... + 30305.

It is an arithmetic number, because the mean of its divisors is an integer number (2047140).

Almost surely, 2^12102009 is an apocalyptic number.

It is an amenable number.

12102009 is a deficient number, since it is larger than the sum of its proper divisors (4275111).

12102009 is an equidigital number, since it uses as much as digits as its factorization.

12102009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60279.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 12102009 is about 3478.7941876461. The cubic root of 12102009 is about 229.5897475562.

The spelling of 12102009 in words is "twelve million, one hundred two thousand, nine".