12539545 has 4 divisors (see below), whose sum is σ = 15047460. Its totient is φ = 10031632.

The previous prime is 12539543. The next prime is 12539551. The reversal of 12539545 is 54593521.

12539545 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7817616 + 4721929 = 2796^2 + 2173^2 .

It is a cyclic number.

It is not a de Polignac number, because 12539545 - 2¹ = 12539543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12539545.

It is not an unprimeable number, because it can be changed into a prime (12539543) 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, 1253950 + ... + 1253959.

It is an arithmetic number, because the mean of its divisors is an integer number (3761865).

Almost surely, 2^12539545 is an apocalyptic number.

It is an amenable number.

12539545 is a deficient number, since it is larger than the sum of its proper divisors (2507915).

12539545 is an equidigital number, since it uses as much as digits as its factorization.

12539545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507914.

The product of its digits is 27000, while the sum is 34.

The square root of 12539545 is about 3541.1219973336. The cubic root of 12539545 is about 232.3239195588.

The spelling of 12539545 in words is "twelve million, five hundred thirty-nine thousand, five hundred forty-five".