12456769 has 4 divisors (see below), whose sum is σ = 13414996. Its totient is φ = 11498544.

The previous prime is 12456751. The next prime is 12456791. The reversal of 12456769 is 96765421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 9684544 = 1665^2 + 3112^2 .

It is a cyclic number.

It is not a de Polignac number, because 12456769 - 2¹⁵ = 12424001 is a prime.

It is a super-2 number, since 2×12456769² = 310342187838722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12456709) 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, 479094 + ... + 479119.

It is an arithmetic number, because the mean of its divisors is an integer number (3353749).

Almost surely, 2^12456769 is an apocalyptic number.

It is an amenable number.

12456769 is a deficient number, since it is larger than the sum of its proper divisors (958227).

12456769 is an equidigital number, since it uses as much as digits as its factorization.

12456769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958226.

The product of its digits is 90720, while the sum is 40.

The square root of 12456769 is about 3529.4148240183. The cubic root of 12456769 is about 231.8115852818.

It can be divided in two parts, 12456 and 769, that added together give a square (13225 = 115²).

The spelling of 12456769 in words is "twelve million, four hundred fifty-six thousand, seven hundred sixty-nine".