12872399 has 4 divisors (see below), whose sum is σ = 12905880. Its totient is φ = 12838920.

The previous prime is 12872393. The next prime is 12872413. The reversal of 12872399 is 99327821.

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: 99327821 = 17 ⋅5842813.

It is a cyclic number.

It is not a de Polignac number, because 12872399 - 2¹⁶ = 12806863 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 (12872393) 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, 16157 + ... + 16934.

It is an arithmetic number, because the mean of its divisors is an integer number (3226470).

Almost surely, 2^12872399 is an apocalyptic number.

12872399 is a deficient number, since it is larger than the sum of its proper divisors (33481).

12872399 is an equidigital number, since it uses as much as digits as its factorization.

12872399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33480.

The product of its digits is 54432, while the sum is 41.

The square root of 12872399 is about 3587.8125647809. The cubic root of 12872399 is about 234.3616233906.

It can be divided in two parts, 128 and 72399, that added together give a palindrome (72527).

The spelling of 12872399 in words is "twelve million, eight hundred seventy-two thousand, three hundred ninety-nine".