13732561 has 2 divisors, whose sum is σ = 13732562. Its totient is φ = 13732560.

The previous prime is 13732559. The next prime is 13732571. The reversal of 13732561 is 16523731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7700625 + 6031936 = 2775^2 + 2456^2 .

It is a cyclic number.

It is not a de Polignac number, because 13732561 - 2¹ = 13732559 is a prime.

Together with 13732559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13732501) 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, 6866280 + 6866281.

It is an arithmetic number, because the mean of its divisors is an integer number (6866281).

Almost surely, 2^13732561 is an apocalyptic number.

It is an amenable number.

13732561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13732561 is an equidigital number, since it uses as much as digits as its factorization.

13732561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 13732561 is about 3705.7470232060. The cubic root of 13732561 is about 239.4696681005.

The spelling of 13732561 in words is "thirteen million, seven hundred thirty-two thousand, five hundred sixty-one".