117281 has 2 divisors, whose sum is σ = 117282. Its totient is φ = 117280.

The previous prime is 117269. The next prime is 117307. The reversal of 117281 is 182711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115600 + 1681 = 340^2 + 41^2 .

It is an emirp because it is prime and its reverse (182711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117281 - 2¹⁰ = 116257 is a prime.

It is a super-2 number, since 2×117281² = 27509665922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58640 + 58641.

It is an arithmetic number, because the mean of its divisors is an integer number (58641).

2¹¹⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

117281 is a deficient number, since it is larger than the sum of its proper divisors (1).

117281 is an equidigital number, since it uses as much as digits as its factorization.

117281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112, while the sum is 20.

The square root of 117281 is about 342.4631367023. The cubic root of 117281 is about 48.9488568148.

Adding to 117281 its reverse (182711), we get a palindrome (299992).

The spelling of 117281 in words is "one hundred seventeen thousand, two hundred eighty-one".