9135521 has 2 divisors, whose sum is σ = 9135522. Its totient is φ = 9135520.

The previous prime is 9135461. The next prime is 9135527. The reversal of 9135521 is 1255319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5290000 + 3845521 = 2300^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 9135521 - 2²² = 4941217 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9135527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4567760 + 4567761.

It is an arithmetic number, because the mean of its divisors is an integer number (4567761).

Almost surely, 2^9135521 is an apocalyptic number.

It is an amenable number.

9135521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9135521 is an equidigital number, since it uses as much as digits as its factorization.

9135521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 26.

The square root of 9135521 is about 3022.5024400321. The cubic root of 9135521 is about 209.0472409866.

The spelling of 9135521 in words is "nine million, one hundred thirty-five thousand, five hundred twenty-one".