12872738 has 18 divisors (see below), whose sum is σ = 20109339. Its totient is φ = 6180132.

The previous prime is 12872731. The next prime is 12872749. The reversal of 12872738 is 83727821.

It can be written as a sum of positive squares in only one way, i.e., 6436369 + 6436369 = 2537^2 + 2537^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2537.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12872731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 218153 + ... + 218211.

Almost surely, 2^12872738 is an apocalyptic number.

12872738 is a deficient number, since it is larger than the sum of its proper divisors (7236601).

12872738 is an frugal number, since it uses more digits than its factorization.

12872738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 104 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 12872738 is about 3587.8598077405. The cubic root of 12872738 is about 234.3636807096.

The spelling of 12872738 in words is "twelve million, eight hundred seventy-two thousand, seven hundred thirty-eight".