12745549 has 2 divisors, whose sum is σ = 12745550. Its totient is φ = 12745548.

The previous prime is 12745541. The next prime is 12745567. The reversal of 12745549 is 94554721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10771524 + 1974025 = 3282^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12745549 - 2³ = 12745541 is a prime.

It is a super-2 number, since 2×12745549² = 324898038622802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12745541) 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 as a sum of consecutive naturals, namely, 6372774 + 6372775.

It is an arithmetic number, because the mean of its divisors is an integer number (6372775).

Almost surely, 2^12745549 is an apocalyptic number.

It is an amenable number.

12745549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12745549 is an equidigital number, since it uses as much as digits as its factorization.

12745549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 12745549 is about 3570.0908952014. The cubic root of 12745549 is about 233.5892482404.

The spelling of 12745549 in words is "twelve million, seven hundred forty-five thousand, five hundred forty-nine".