6249521 has 2 divisors, whose sum is σ = 6249522. Its totient is φ = 6249520.

The previous prime is 6249517. The next prime is 6249539. The reversal of 6249521 is 1259426.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4389025 + 1860496 = 2095^2 + 1364^2 .

It is a cyclic number.

It is not a de Polignac number, because 6249521 - 2² = 6249517 is a prime.

It is not a weakly prime, because it can be changed into another prime (6249571) 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, 3124760 + 3124761.

It is an arithmetic number, because the mean of its divisors is an integer number (3124761).

Almost surely, 2^6249521 is an apocalyptic number.

It is an amenable number.

6249521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6249521 is an equidigital number, since it uses as much as digits as its factorization.

6249521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 6249521 is about 2499.9041981644. The cubic root of 6249521 is about 184.1968690756.

The spelling of 6249521 in words is "six million, two hundred forty-nine thousand, five hundred twenty-one".