12872305 has 4 divisors (see below), whose sum is σ = 15446772. Its totient is φ = 10297840.

The previous prime is 12872303. The next prime is 12872311. The reversal of 12872305 is 50327821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50327821 = 2503 ⋅20107.

It can be written as a sum of positive squares in 2 ways, for example, as 7890481 + 4981824 = 2809^2 + 2232^2 .

It is not a de Polignac number, because 12872305 - 2¹ = 12872303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12872303) 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 3 ways as a sum of consecutive naturals, for example, 1287226 + ... + 1287235.

It is an arithmetic number, because the mean of its divisors is an integer number (3861693).

Almost surely, 2^12872305 is an apocalyptic number.

It is an amenable number.

12872305 is a deficient number, since it is larger than the sum of its proper divisors (2574467).

12872305 is an equidigital number, since it uses as much as digits as its factorization.

12872305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574466.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 12872305 is about 3587.7994648531. The cubic root of 12872305 is about 234.3610529182.

The spelling of 12872305 in words is "twelve million, eight hundred seventy-two thousand, three hundred five".