4212009 has 6 divisors (see below), whose sum is σ = 6084026. Its totient is φ = 2808000.

The previous prime is 4211993. The next prime is 4212023. The reversal of 4212009 is 9002124.

It can be written as a sum of positive squares in only one way, i.e., 4112784 + 99225 = 2028^2 + 315^2 .

It is not a de Polignac number, because 4212009 - 2⁴ = 4211993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4211982 and 4212000.

It is not an unprimeable number, because it can be changed into a prime (4212029) 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 5 ways as a sum of consecutive naturals, for example, 233992 + ... + 234009.

Almost surely, 2^4212009 is an apocalyptic number.

It is an amenable number.

4212009 is a deficient number, since it is larger than the sum of its proper divisors (1872017).

4212009 is a wasteful number, since it uses less digits than its factorization.

4212009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468007 (or 468004 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 4212009 is about 2052.3179578223. The cubic root of 4212009 is about 161.4964933884.

The spelling of 4212009 in words is "four million, two hundred twelve thousand, nine".