13528561 has 2 divisors, whose sum is σ = 13528562. Its totient is φ = 13528560.

The previous prime is 13528547. The next prime is 13528597. The reversal of 13528561 is 16582531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8439025 + 5089536 = 2905^2 + 2256^2 .

It is a cyclic number.

It is not a de Polignac number, because 13528561 - 2¹⁵ = 13495793 is a prime.

It is not a weakly prime, because it can be changed into another prime (13528261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6764280 + 6764281.

It is an arithmetic number, because the mean of its divisors is an integer number (6764281).

Almost surely, 2^13528561 is an apocalyptic number.

It is an amenable number.

13528561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13528561 is an equidigital number, since it uses as much as digits as its factorization.

13528561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 13528561 is about 3678.1192204712. The cubic root of 13528561 is about 238.2779571520.

The spelling of 13528561 in words is "thirteen million, five hundred twenty-eight thousand, five hundred sixty-one".