12986539 has 8 divisors (see below), whose sum is σ = 13233888. Its totient is φ = 12741120.

The previous prime is 12986527. The next prime is 12986563. The reversal of 12986539 is 93568921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12986539 - 2⁵ = 12986507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12986495 and 12986504.

It is not an unprimeable number, because it can be changed into a prime (12986509) 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, 22219 + ... + 22795.

It is an arithmetic number, because the mean of its divisors is an integer number (1654236).

Almost surely, 2^12986539 is an apocalyptic number.

12986539 is a deficient number, since it is larger than the sum of its proper divisors (247349).

12986539 is an equidigital number, since it uses as much as digits as its factorization.

12986539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965.

The product of its digits is 116640, while the sum is 43.

The square root of 12986539 is about 3603.6840871530. The cubic root of 12986539 is about 235.0522835231.

It can be divided in two parts, 129 and 86539, that added together give a palindrome (86668).

The spelling of 12986539 in words is "twelve million, nine hundred eighty-six thousand, five hundred thirty-nine".