13526521 has 2 divisors, whose sum is σ = 13526522. Its totient is φ = 13526520.

The previous prime is 13526503. The next prime is 13526581. The reversal of 13526521 is 12562531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 3515625 = 3164^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 13526521 - 2⁵ = 13526489 is a prime.

It is not a weakly prime, because it can be changed into another prime (13526581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6763260 + 6763261.

It is an arithmetic number, because the mean of its divisors is an integer number (6763261).

Almost surely, 2^13526521 is an apocalyptic number.

It is an amenable number.

13526521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13526521 is an equidigital number, since it uses as much as digits as its factorization.

13526521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 13526521 is about 3677.8418943723. The cubic root of 13526521 is about 238.2659797395.

The spelling of 13526521 in words is "thirteen million, five hundred twenty-six thousand, five hundred twenty-one".