13160561 has 2 divisors, whose sum is σ = 13160562. Its totient is φ = 13160560.

The previous prime is 13160557. The next prime is 13160569. The reversal of 13160561 is 16506131.

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., 12559936 + 600625 = 3544^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 13160561 - 2² = 13160557 is a prime.

It is not a weakly prime, because it can be changed into another prime (13160569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6580280 + 6580281.

It is an arithmetic number, because the mean of its divisors is an integer number (6580281).

Almost surely, 2^13160561 is an apocalyptic number.

It is an amenable number.

13160561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13160561 is an equidigital number, since it uses as much as digits as its factorization.

13160561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 13160561 is about 3627.7487509473. The cubic root of 13160561 is about 236.0975429876.

Adding to 13160561 its reverse (16506131), we get a palindrome (29666692).

The spelling of 13160561 in words is "thirteen million, one hundred sixty thousand, five hundred sixty-one".