2112009 has 4 divisors (see below), whose sum is σ = 2816016. Its totient is φ = 1408004.

The previous prime is 2112007. The next prime is 2112013. The reversal of 2112009 is 9002112.

It is a happy number.

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 2112009 - 2¹ = 2112007 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2112007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351999 + ... + 352004.

It is an arithmetic number, because the mean of its divisors is an integer number (704004).

2^2112009 is an apocalyptic number.

It is an amenable number.

2112009 is a deficient number, since it is larger than the sum of its proper divisors (704007).

2112009 is an equidigital number, since it uses as much as digits as its factorization.

2112009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704006.

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

The square root of 2112009 is about 1453.2752664241. The cubic root of 2112009 is about 128.3015554458.

The spelling of 2112009 in words is "two million, one hundred twelve thousand, nine".