12132539 has 4 divisors (see below), whose sum is σ = 12141624. Its totient is φ = 12123456.

The previous prime is 12132529. The next prime is 12132553. The reversal of 12132539 is 93523121.

12132539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93523121 = 431 ⋅216991.

It is a cyclic number.

It is not a de Polignac number, because 12132539 - 2¹² = 12128443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12132529) 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, 2102 + ... + 5355.

It is an arithmetic number, because the mean of its divisors is an integer number (3035406).

Almost surely, 2^12132539 is an apocalyptic number.

12132539 is a deficient number, since it is larger than the sum of its proper divisors (9085).

12132539 is an equidigital number, since it uses as much as digits as its factorization.

12132539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9084.

The product of its digits is 1620, while the sum is 26.

The square root of 12132539 is about 3483.1794383867. The cubic root of 12132539 is about 229.7826491096.

The spelling of 12132539 in words is "twelve million, one hundred thirty-two thousand, five hundred thirty-nine".