12144509 has 6 divisors (see below), whose sum is σ = 13150746. Its totient is φ = 11210160.

The previous prime is 12144493. The next prime is 12144521. The reversal of 12144509 is 90544121.

12144509 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 3 ways, for example, as 1562500 + 10582009 = 1250^2 + 3253^2 .

It is not a de Polignac number, because 12144509 - 2⁴ = 12144493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144589) 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, 35762 + ... + 36099.

It is an arithmetic number, because the mean of its divisors is an integer number (2191791).

Almost surely, 2^12144509 is an apocalyptic number.

It is an amenable number.

12144509 is a deficient number, since it is larger than the sum of its proper divisors (1006237).

12144509 is an equidigital number, since it uses as much as digits as its factorization.

12144509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71887 (or 71874 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12144509 is about 3484.8972725175. The cubic root of 12144509 is about 229.8581923589.

The spelling of 12144509 in words is "twelve million, one hundred forty-four thousand, five hundred nine".