13478281 has 2 divisors, whose sum is σ = 13478282. Its totient is φ = 13478280.

The previous prime is 13478261. The next prime is 13478291. The reversal of 13478281 is 18287431.

It is a happy number.

13478281 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., 13388281 + 90000 = 3659^2 + 300^2 .

It is an emirp because it is prime and its reverse (18287431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13478281 - 2¹¹ = 13476233 is a prime.

It is a super-2 number, since 2×13478281² = 363328117429922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13478251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6739140 + 6739141.

It is an arithmetic number, because the mean of its divisors is an integer number (6739141).

Almost surely, 2^13478281 is an apocalyptic number.

It is an amenable number.

13478281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13478281 is an equidigital number, since it uses as much as digits as its factorization.

13478281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 13478281 is about 3671.2778429315. The cubic root of 13478281 is about 237.9823975400.

The spelling of 13478281 in words is "thirteen million, four hundred seventy-eight thousand, two hundred eighty-one".