12544549 has 2 divisors, whose sum is σ = 12544550. Its totient is φ = 12544548.

The previous prime is 12544547. The next prime is 12544577. The reversal of 12544549 is 94544521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11175649 + 1368900 = 3343^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 12544549 - 2¹ = 12544547 is a prime.

It is a super-2 number, since 2×12544549² = 314731419226802, which contains 22 as substring.

Together with 12544547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12544547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272274 + 6272275.

It is an arithmetic number, because the mean of its divisors is an integer number (6272275).

Almost surely, 2^12544549 is an apocalyptic number.

It is an amenable number.

12544549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12544549 is an equidigital number, since it uses as much as digits as its factorization.

12544549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 12544549 is about 3541.8284825779. The cubic root of 12544549 is about 232.3548189863.

The spelling of 12544549 in words is "twelve million, five hundred forty-four thousand, five hundred forty-nine".