12780469 has 4 divisors (see below), whose sum is σ = 13763596. Its totient is φ = 11797344.

The previous prime is 12780409. The next prime is 12780511. The reversal of 12780469 is 96408721.

12780469 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 96408721 = 103 ⋅936007.

It can be written as a sum of positive squares in 2 ways, for example, as 877969 + 11902500 = 937^2 + 3450^2 .

It is not a de Polignac number, because 12780469 - 2¹¹ = 12778421 is a prime.

It is a super-2 number, since 2×12780469² = 326680775719922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780409) 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, 491544 + ... + 491569.

It is an arithmetic number, because the mean of its divisors is an integer number (3440899).

Almost surely, 2^12780469 is an apocalyptic number.

It is an amenable number.

12780469 is a deficient number, since it is larger than the sum of its proper divisors (983127).

12780469 is an equidigital number, since it uses as much as digits as its factorization.

12780469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983126.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 12780469 is about 3574.9781817516. The cubic root of 12780469 is about 233.8023814282.

The spelling of 12780469 in words is "twelve million, seven hundred eighty thousand, four hundred sixty-nine".