12456729 has 12 divisors (see below), whose sum is σ = 18298800. Its totient is φ = 8163384.

The previous prime is 12456721. The next prime is 12456751. The reversal of 12456729 is 92765421.

12456729 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12456729 - 2³ = 12456721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12456693 and 12456702.

It is not an unprimeable number, because it can be changed into a prime (12456721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11199 + ... + 12260.

It is an arithmetic number, because the mean of its divisors is an integer number (1524900).

Almost surely, 2^12456729 is an apocalyptic number.

It is an amenable number.

12456729 is a deficient number, since it is larger than the sum of its proper divisors (5842071).

12456729 is a wasteful number, since it uses less digits than its factorization.

12456729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23524 (or 23521 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 12456729 is about 3529.4091573520. The cubic root of 12456729 is about 231.8113371577.

The spelling of 12456729 in words is "twelve million, four hundred fifty-six thousand, seven hundred twenty-nine".