12855247 has 4 divisors (see below), whose sum is σ = 13611456. Its totient is φ = 12099040.

The previous prime is 12855239. The next prime is 12855251. The reversal of 12855247 is 74255821.

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: 74255821 = 389 ⋅190889.

It is a cyclic number.

It is not a de Polignac number, because 12855247 - 2³ = 12855239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12855217) 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, 378079 + ... + 378112.

It is an arithmetic number, because the mean of its divisors is an integer number (3402864).

Almost surely, 2^12855247 is an apocalyptic number.

12855247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12855247 is a deficient number, since it is larger than the sum of its proper divisors (756209).

12855247 is an equidigital number, since it uses as much as digits as its factorization.

12855247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756208.

The product of its digits is 22400, while the sum is 34.

The square root of 12855247 is about 3585.4214536090. The cubic root of 12855247 is about 234.2574843645.

The spelling of 12855247 in words is "twelve million, eight hundred fifty-five thousand, two hundred forty-seven".