12539136 has 72 divisors (see below), whose sum is σ = 34584480. Its totient is φ = 4028416.

The previous prime is 12539113. The next prime is 12539161. The reversal of 12539136 is 63193521.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 21991 + ... + 22553.

It is an arithmetic number, because the mean of its divisors is an integer number (480340).

Almost surely, 2^12539136 is an apocalyptic number.

12539136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12539136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17292240).

12539136 is an abundant number, since it is smaller than the sum of its proper divisors (22045344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12539136 is an equidigital number, since it uses as much as digits as its factorization.

12539136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 597 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 12539136 is about 3541.0642468049. The cubic root of 12539136 is about 232.3213936427.

The spelling of 12539136 in words is "twelve million, five hundred thirty-nine thousand, one hundred thirty-six".