13561841 has 2 divisors, whose sum is σ = 13561842. Its totient is φ = 13561840.

The previous prime is 13561837. The next prime is 13561843. The reversal of 13561841 is 14816531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10336225 + 3225616 = 3215^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 13561841 - 2² = 13561837 is a prime.

It is a Sophie Germain prime.

Together with 13561843, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13561843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6780920 + 6780921.

It is an arithmetic number, because the mean of its divisors is an integer number (6780921).

Almost surely, 2^13561841 is an apocalyptic number.

It is an amenable number.

13561841 is a deficient number, since it is larger than the sum of its proper divisors (1).

13561841 is an equidigital number, since it uses as much as digits as its factorization.

13561841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 13561841 is about 3682.6404929072. The cubic root of 13561841 is about 238.4731835531.

The spelling of 13561841 in words is "thirteen million, five hundred sixty-one thousand, eight hundred forty-one".