12729256 has 16 divisors (see below), whose sum is σ = 23973300. Its totient is φ = 6336384.

The previous prime is 12729253. The next prime is 12729271. The reversal of 12729256 is 65292721.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 240100 = 3534^2 + 490^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12729253) 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, 1551 + ... + 5278.

Almost surely, 2^12729256 is an apocalyptic number.

It is an amenable number.

12729256 is a deficient number, since it is larger than the sum of its proper divisors (11244044).

12729256 is a wasteful number, since it uses less digits than its factorization.

12729256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068 (or 7064 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 12729256 is about 3567.8082908138. The cubic root of 12729256 is about 233.4896711909.

The spelling of 12729256 in words is "twelve million, seven hundred twenty-nine thousand, two hundred fifty-six".