13400281 has 2 divisors, whose sum is σ = 13400282. Its totient is φ = 13400280.

The previous prime is 13400279. The next prime is 13400341. The reversal of 13400281 is 18200431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9865881 + 3534400 = 3141^2 + 1880^2 .

It is an emirp because it is prime and its reverse (18200431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13400281 - 2¹ = 13400279 is a prime.

It is a super-2 number, since 2×13400281² = 359135061757922, which contains 22 as substring.

Together with 13400279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13400251) 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, 6700140 + 6700141.

It is an arithmetic number, because the mean of its divisors is an integer number (6700141).

Almost surely, 2^13400281 is an apocalyptic number.

It is an amenable number.

13400281 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400281 is an equidigital number, since it uses as much as digits as its factorization.

13400281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 13400281 is about 3660.6394250185. The cubic root of 13400281 is about 237.5224340766.

The spelling of 13400281 in words is "thirteen million, four hundred thousand, two hundred eighty-one".