12047009 has 16 divisors (see below), whose sum is σ = 13867392. Its totient is φ = 10378368.

The previous prime is 12046997. The next prime is 12047029. The reversal of 12047009 is 90074021.

It is not a de Polignac number, because 12047009 - 2⁸ = 12046753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12047029) 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 15 ways as a sum of consecutive naturals, for example, 12389 + ... + 13325.

It is an arithmetic number, because the mean of its divisors is an integer number (866712).

Almost surely, 2^12047009 is an apocalyptic number.

It is an amenable number.

12047009 is a deficient number, since it is larger than the sum of its proper divisors (1820383).

12047009 is a wasteful number, since it uses less digits than its factorization.

12047009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 12047009 is about 3470.8801477435. The cubic root of 12047009 is about 229.2414138246.

The spelling of 12047009 in words is "twelve million, forty-seven thousand, nine".