12456739 has 4 divisors (see below), whose sum is σ = 12721824. Its totient is φ = 12191656.

The previous prime is 12456721. The next prime is 12456751. The reversal of 12456739 is 93765421.

12456739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12456739 - 2¹¹ = 12454691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12456698 and 12456707.

It is not an unprimeable number, because it can be changed into a prime (12456709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132472 + ... + 132565.

It is an arithmetic number, because the mean of its divisors is an integer number (3180456).

Almost surely, 2^12456739 is an apocalyptic number.

12456739 is a deficient number, since it is larger than the sum of its proper divisors (265085).

12456739 is an equidigital number, since it uses as much as digits as its factorization.

12456739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265084.

The product of its digits is 45360, while the sum is 37.

The square root of 12456739 is about 3529.4105740194. The cubic root of 12456739 is about 231.8113991887.

The spelling of 12456739 in words is "twelve million, four hundred fifty-six thousand, seven hundred thirty-nine".