12986571 has 8 divisors (see below), whose sum is σ = 18647440. Its totient is φ = 7991712.

The previous prime is 12986563. The next prime is 12986579. The reversal of 12986571 is 17568921.

It is an interprime number because it is at equal distance from previous prime (12986563) and next prime (12986579).

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

It is not a de Polignac number, because 12986571 - 2³ = 12986563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 332989 = 12986571 / (1 + 2 + 9 + 8 + 6 + 5 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12986579) 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, 166456 + ... + 166533.

It is an arithmetic number, because the mean of its divisors is an integer number (2330930).

Almost surely, 2^12986571 is an apocalyptic number.

12986571 is a deficient number, since it is larger than the sum of its proper divisors (5660869).

12986571 is a wasteful number, since it uses less digits than its factorization.

12986571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333005.

The product of its digits is 30240, while the sum is 39.

The square root of 12986571 is about 3603.6885270511. The cubic root of 12986571 is about 235.0524765863.

The spelling of 12986571 in words is "twelve million, nine hundred eighty-six thousand, five hundred seventy-one".