12680549 has 4 divisors (see below), whose sum is σ = 14492064. Its totient is φ = 10869036.

The previous prime is 12680537. The next prime is 12680557. The reversal of 12680549 is 94508621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94508621 = 997 ⋅94793.

It is a cyclic number.

It is not a de Polignac number, because 12680549 - 2⁴ = 12680533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12680509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905747 + ... + 905760.

It is an arithmetic number, because the mean of its divisors is an integer number (3623016).

Almost surely, 2^12680549 is an apocalyptic number.

It is an amenable number.

12680549 is a deficient number, since it is larger than the sum of its proper divisors (1811515).

12680549 is an equidigital number, since it uses as much as digits as its factorization.

12680549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811514.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12680549 is about 3560.9758493986. The cubic root of 12680549 is about 233.1914836244.

The spelling of 12680549 in words is "twelve million, six hundred eighty thousand, five hundred forty-nine".