8125549 has 2 divisors, whose sum is σ = 8125550. Its totient is φ = 8125548.

The previous prime is 8125547. The next prime is 8125561. The reversal of 8125549 is 9455218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5929225 + 2196324 = 2435^2 + 1482^2 .

It is a cyclic number.

It is not a de Polignac number, because 8125549 - 2¹ = 8125547 is a prime.

Together with 8125547, 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 (8125543) 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, 4062774 + 4062775.

It is an arithmetic number, because the mean of its divisors is an integer number (4062775).

Almost surely, 2^8125549 is an apocalyptic number.

It is an amenable number.

8125549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8125549 is an equidigital number, since it uses as much as digits as its factorization.

8125549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 8125549 is about 2850.5348620917. The cubic root of 8125549 is about 201.0408157833.

The spelling of 8125549 in words is "eight million, one hundred twenty-five thousand, five hundred forty-nine".