13571281 has 2 divisors, whose sum is σ = 13571282. Its totient is φ = 13571280.

The previous prime is 13571249. The next prime is 13571291. The reversal of 13571281 is 18217531.

13571281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9511056 + 4060225 = 3084^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 13571281 - 2⁵ = 13571249 is a prime.

It is a super-2 number, since 2×13571281² = 368359335961922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13571291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6785640 + 6785641.

It is an arithmetic number, because the mean of its divisors is an integer number (6785641).

Almost surely, 2^13571281 is an apocalyptic number.

13571281 is the 1648-th centered decagonal number.

It is an amenable number.

13571281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13571281 is an equidigital number, since it uses as much as digits as its factorization.

13571281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

The square root of 13571281 is about 3683.9219589997. The cubic root of 13571281 is about 238.5285021175.

The spelling of 13571281 in words is "thirteen million, five hundred seventy-one thousand, two hundred eighty-one".