12087009 has 16 divisors (see below), whose sum is σ = 19535040. Its totient is φ = 7325280.

The previous prime is 12087007. The next prime is 12087013. The reversal of 12087009 is 90078021.

It is not a de Polignac number, because 12087009 - 2¹ = 12087007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12087007) 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, 20052 + ... + 20645.

It is an arithmetic number, because the mean of its divisors is an integer number (1220940).

Almost surely, 2^12087009 is an apocalyptic number.

It is an amenable number.

12087009 is a deficient number, since it is larger than the sum of its proper divisors (7448031).

12087009 is a wasteful number, since it uses less digits than its factorization.

12087009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40717 (or 40711 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 12087009 is about 3476.6375997507. The cubic root of 12087009 is about 229.4948522917.

The spelling of 12087009 in words is "twelve million, eighty-seven thousand, nine".