12881549 has 4 divisors (see below), whose sum is σ = 12889536. Its totient is φ = 12873564.

The previous prime is 12881543. The next prime is 12881551. The reversal of 12881549 is 94518821.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94518821 = 71 ⋅1331251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12881549 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 (12881543) 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, 629 + ... + 5114.

It is an arithmetic number, because the mean of its divisors is an integer number (3222384).

Almost surely, 2^12881549 is an apocalyptic number.

It is an amenable number.

12881549 is a deficient number, since it is larger than the sum of its proper divisors (7987).

12881549 is an equidigital number, since it uses as much as digits as its factorization.

12881549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986.

The product of its digits is 23040, while the sum is 38.

The square root of 12881549 is about 3589.0874884851. The cubic root of 12881549 is about 234.4171401325.

The spelling of 12881549 in words is "twelve million, eight hundred eighty-one thousand, five hundred forty-nine".