13545281 has 2 divisors, whose sum is σ = 13545282. Its totient is φ = 13545280.

The previous prime is 13545253. The next prime is 13545283. The reversal of 13545281 is 18254531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 1985281 = 3400^2 + 1409^2 .

It is an emirp because it is prime and its reverse (18254531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13545281 - 2¹⁴ = 13528897 is a prime.

It is a super-2 number, since 2×13545281² = 366949274737922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 13545283, 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 (13545283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772640 + 6772641.

It is an arithmetic number, because the mean of its divisors is an integer number (6772641).

Almost surely, 2^13545281 is an apocalyptic number.

It is an amenable number.

13545281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13545281 is an equidigital number, since it uses as much as digits as its factorization.

13545281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 29.

The square root of 13545281 is about 3680.3914194009. The cubic root of 13545281 is about 238.3760796177.

The spelling of 13545281 in words is "thirteen million, five hundred forty-five thousand, two hundred eighty-one".