12986859 has 4 divisors (see below), whose sum is σ = 17315816. Its totient is φ = 8657904.

The previous prime is 12986849. The next prime is 12986863. The reversal of 12986859 is 95868921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95868921 = 3 ⋅31956307.

It is not a de Polignac number, because 12986859 - 2¹⁵ = 12954091 is a prime.

It is a super-3 number, since 3×12986859³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12986849) 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 3 ways as a sum of consecutive naturals, for example, 2164474 + ... + 2164479.

It is an arithmetic number, because the mean of its divisors is an integer number (4328954).

Almost surely, 2^12986859 is an apocalyptic number.

12986859 is a deficient number, since it is larger than the sum of its proper divisors (4328957).

12986859 is an equidigital number, since it uses as much as digits as its factorization.

12986859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328956.

The product of its digits is 311040, while the sum is 48.

The square root of 12986859 is about 3603.7284858879. The cubic root of 12986859 is about 235.0542141405.

The spelling of 12986859 in words is "twelve million, nine hundred eighty-six thousand, eight hundred fifty-nine".