12539906 has 16 divisors (see below), whose sum is σ = 19278648. Its totient is φ = 6115200.

The previous prime is 12539893. The next prime is 12539909. The reversal of 12539906 is 60993521.

It can be written as a sum of positive squares in 4 ways, for example, as 9150625 + 3389281 = 3025^2 + 1841^2 .

It is not an unprimeable number, because it can be changed into a prime (12539909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29576 + ... + 29996.

Almost surely, 2^12539906 is an apocalyptic number.

12539906 is a deficient number, since it is larger than the sum of its proper divisors (6738742).

12539906 is a wasteful number, since it uses less digits than its factorization.

12539906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 12539906 is about 3541.1729695117. The cubic root of 12539906 is about 232.3261489892.

The spelling of 12539906 in words is "twelve million, five hundred thirty-nine thousand, nine hundred six".