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5281 is a prime number
BaseRepresentation
bin1010010100001
321020121
41102201
5132111
640241
721253
oct12241
97217
105281
113a71
123081
132533
141cd3
151871
hex14a1

5281 has 2 divisors, whose sum is σ = 5282. Its totient is φ = 5280.

The previous prime is 5279. The next prime is 5297. The reversal of 5281 is 1825.

It can be divided in two parts, 528 and 1, that added together give a square (529 = 232).

It is a happy number.

It is an a-pointer prime, because the next prime (5297) can be obtained adding 5281 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3600 + 1681 = 60^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 5281 - 21 = 5279 is a prime.

It is a super-2 number, since 2×52812 = 55777922, which contains 22 as substring.

Together with 5279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640 + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (2641).

5281 is the 33-rd centered decagonal number.

It is an amenable number.

5281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5281 is an equidigital number, since it uses as much as digits as its factorization.

5281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 16.

The square root of 5281 is about 72.6704891961. The cubic root of 5281 is about 17.4142746296.

The spelling of 5281 in words is "five thousand, two hundred eighty-one".