12878249 has 4 divisors (see below), whose sum is σ = 12892164. Its totient is φ = 12864336.

The previous prime is 12878227. The next prime is 12878267. The reversal of 12878249 is 94287821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94287821 = 677 ⋅139273.

It can be written as a sum of positive squares in 2 ways, for example, as 9241600 + 3636649 = 3040^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 12878249 - 2²⁰ = 11829673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12875249) 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, 5462 + ... + 7455.

It is an arithmetic number, because the mean of its divisors is an integer number (3223041).

Almost surely, 2^12878249 is an apocalyptic number.

It is an amenable number.

12878249 is a deficient number, since it is larger than the sum of its proper divisors (13915).

12878249 is an equidigital number, since it uses as much as digits as its factorization.

12878249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13914.

The product of its digits is 64512, while the sum is 41.

The square root of 12878249 is about 3588.6277321561. The cubic root of 12878249 is about 234.3971207329.

The spelling of 12878249 in words is "twelve million, eight hundred seventy-eight thousand, two hundred forty-nine".