12971539 has 8 divisors (see below), whose sum is σ = 15186528. Its totient is φ = 10847040.

The previous prime is 12971533. The next prime is 12971549. The reversal of 12971539 is 93517921.

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 12971539 - 2⁵ = 12971507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12971498 and 12971507.

It is not an unprimeable number, because it can be changed into a prime (12971533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22312 + ... + 22885.

It is an arithmetic number, because the mean of its divisors is an integer number (1898316).

Almost surely, 2^12971539 is an apocalyptic number.

12971539 is a deficient number, since it is larger than the sum of its proper divisors (2214989).

12971539 is an equidigital number, since it uses as much as digits as its factorization.

12971539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45245.

The product of its digits is 17010, while the sum is 37.

The square root of 12971539 is about 3601.6022823182. The cubic root of 12971539 is about 234.9617502255.

The spelling of 12971539 in words is "twelve million, nine hundred seventy-one thousand, five hundred thirty-nine".