12986247 has 4 divisors (see below), whose sum is σ = 17315000. Its totient is φ = 8657496.

The previous prime is 12986243. The next prime is 12986261. The reversal of 12986247 is 74268921.

12986247 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74268921 = 3 ⋅24756307.

It is not a de Polignac number, because 12986247 - 2² = 12986243 is a prime.

It is a super-2 number, since 2×12986247² = 337285222290018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12986243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164372 + ... + 2164377.

It is an arithmetic number, because the mean of its divisors is an integer number (4328750).

Almost surely, 2^12986247 is an apocalyptic number.

12986247 is a deficient number, since it is larger than the sum of its proper divisors (4328753).

12986247 is an equidigital number, since it uses as much as digits as its factorization.

12986247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328752.

The product of its digits is 48384, while the sum is 39.

The square root of 12986247 is about 3603.6435728301. The cubic root of 12986247 is about 235.0505218071.

The spelling of 12986247 in words is "twelve million, nine hundred eighty-six thousand, two hundred forty-seven".