8253521 has 2 divisors, whose sum is σ = 8253522. Its totient is φ = 8253520.

The previous prime is 8253499. The next prime is 8253523. The reversal of 8253521 is 1253528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 193600 = 2839^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 8253521 - 2¹⁴ = 8237137 is a prime.

Together with 8253523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8253523) 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, 4126760 + 4126761.

It is an arithmetic number, because the mean of its divisors is an integer number (4126761).

Almost surely, 2^8253521 is an apocalyptic number.

It is an amenable number.

8253521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8253521 is an equidigital number, since it uses as much as digits as its factorization.

8253521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 26.

The square root of 8253521 is about 2872.8941853121. The cubic root of 8253521 is about 202.0907428136.

The spelling of 8253521 in words is "eight million, two hundred fifty-three thousand, five hundred twenty-one".