12872123 has 4 divisors (see below), whose sum is σ = 14042328. Its totient is φ = 11701920.

The previous prime is 12872117. The next prime is 12872131. The reversal of 12872123 is 32127821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12872123 - 2⁶ = 12872059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12872092 and 12872101.

It is not an unprimeable number, because it can be changed into a prime (12872173) 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, 585086 + ... + 585107.

It is an arithmetic number, because the mean of its divisors is an integer number (3510582).

Almost surely, 2^12872123 is an apocalyptic number.

12872123 is a deficient number, since it is larger than the sum of its proper divisors (1170205).

12872123 is a wasteful number, since it uses less digits than its factorization.

12872123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170204.

The product of its digits is 1344, while the sum is 26.

The square root of 12872123 is about 3587.7741010270. The cubic root of 12872123 is about 234.3599483786.

Adding to 12872123 its reverse (32127821), we get a palindrome (44999944).

The spelling of 12872123 in words is "twelve million, eight hundred seventy-two thousand, one hundred twenty-three".