12027509 has 4 divisors (see below), whose sum is σ = 12952716. Its totient is φ = 11102304.

The previous prime is 12027497. The next prime is 12027511. The reversal of 12027509 is 90572021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90572021 = 59 ⋅1535119.

It can be written as a sum of positive squares in 2 ways, for example, as 5189284 + 6838225 = 2278^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 12027509 - 2⁴ = 12027493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12027529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462584 + ... + 462609.

It is an arithmetic number, because the mean of its divisors is an integer number (3238179).

Almost surely, 2^12027509 is an apocalyptic number.

It is an amenable number.

12027509 is a deficient number, since it is larger than the sum of its proper divisors (925207).

12027509 is an equidigital number, since it uses as much as digits as its factorization.

12027509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925206.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 12027509 is about 3468.0699243239. The cubic root of 12027509 is about 229.1176591329.

The spelling of 12027509 in words is "twelve million, twenty-seven thousand, five hundred nine".