12150009 has 6 divisors (see below), whose sum is σ = 17550026. Its totient is φ = 8100000.

The previous prime is 12150001. The next prime is 12150011. The reversal of 12150009 is 90005121.

12150009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 4112784 = 2835^2 + 2028^2 .

It is not a de Polignac number, because 12150009 - 2³ = 12150001 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 = 12149973 and 12150000.

It is not an unprimeable number, because it can be changed into a prime (12150001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 674992 + ... + 675009.

Almost surely, 2^12150009 is an apocalyptic number.

It is an amenable number.

12150009 is a deficient number, since it is larger than the sum of its proper divisors (5400017).

12150009 is a wasteful number, since it uses less digits than its factorization.

12150009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350007 (or 1350004 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 12150009 is about 3485.6863025809. The cubic root of 12150009 is about 229.8928864817.

The spelling of 12150009 in words is "twelve million, one hundred fifty thousand, nine".