12022009 has 4 divisors (see below), whose sum is σ = 12729204. Its totient is φ = 11314816.

The previous prime is 12022007. The next prime is 12022013. The reversal of 12022009 is 90022021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10582009 + 1440000 = 3253^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 12022009 - 2¹ = 12022007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021983 and 12022001.

It is not an unprimeable number, because it can be changed into a prime (12022007) 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, 353572 + ... + 353605.

It is an arithmetic number, because the mean of its divisors is an integer number (3182301).

Almost surely, 2^12022009 is an apocalyptic number.

It is an amenable number.

12022009 is a deficient number, since it is larger than the sum of its proper divisors (707195).

12022009 is an equidigital number, since it uses as much as digits as its factorization.

12022009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707194.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12022009 is about 3467.2768853958. The cubic root of 12022009 is about 229.0827297818.

The spelling of 12022009 in words is "twelve million, twenty-two thousand, nine".