125000549 has 2 divisors, whose sum is σ = 125000550. Its totient is φ = 125000548.

The previous prime is 125000543. The next prime is 125000597. The reversal of 125000549 is 945000521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119793025 + 5207524 = 10945^2 + 2282^2 .

It is an emirp because it is prime and its reverse (945000521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125000549 - 2²⁰ = 123951973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125000543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62500274 + 62500275.

It is an arithmetic number, because the mean of its divisors is an integer number (62500275).

Almost surely, 2^125000549 is an apocalyptic number.

It is an amenable number.

125000549 is a deficient number, since it is larger than the sum of its proper divisors (1).

125000549 is an equidigital number, since it uses as much as digits as its factorization.

125000549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 125000549 is about 11180.3644394984. The cubic root of 125000549 is about 500.0007319989. Note that the first 3 decimals are identical.

The spelling of 125000549 in words is "one hundred twenty-five million, five hundred forty-nine", and thus it is an aban number.