12712736 has 24 divisors (see below), whose sum is σ = 26501580. Its totient is φ = 5982208.

The previous prime is 12712727. The next prime is 12712741. The reversal of 12712736 is 63721721.

It can be written as a sum of positive squares in 2 ways, for example, as 12645136 + 67600 = 3556^2 + 260^2 .

It is a super-2 number, since 2×12712736² = 323227313211392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12712699 and 12712708.

It is an unprimeable number.

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, 11141 + ... + 12228.

Almost surely, 2^12712736 is an apocalyptic number.

12712736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12712736 is an abundant number, since it is smaller than the sum of its proper divisors (13788844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12712736 is a wasteful number, since it uses less digits than its factorization.

12712736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23396 (or 23388 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 12712736 is about 3565.4923923632. The cubic root of 12712736 is about 233.3886200058.

The spelling of 12712736 in words is "twelve million, seven hundred twelve thousand, seven hundred thirty-six".