4481 has 2 divisors, whose sum is σ = 4482. Its totient is φ = 4480.
The previous prime is 4463. The next prime is 4483. The reversal of 4481 is 1844.
It is a happy number.
4481 is nontrivially palindromic in base 8.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 4225 + 256 = 65^2 + 16^2 .
It is a cyclic number.
It is not a de Polignac number, because 4481 - 210 = 3457 is a prime.
It is a super-2 number, since 2×44812 = 40158722, which contains 22 as substring.
It is a Sophie Germain prime.
Together with 4483, it forms a pair of twin primes.
It is a Chen prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (4483) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2240 + 2241.
It is an arithmetic number, because the mean of its divisors is an integer number (2241).
It is a Proth number, since it is equal to 35 ⋅ 27 + 1 and 35 < 27.
It is an amenable number.
4481 is a deficient number, since it is larger than the sum of its proper divisors (1).
4481 is an equidigital number, since it uses as much as digits as its factorization.
4481 is an evil number, because the sum of its binary digits is even.
The product of its digits is 128, while the sum is 17.
The square root of 4481 is about 66.9402718847. The cubic root of 4481 is about 16.4863676810.
It can be divided in two parts, 44 and 81, that added together give a cube (125 = 53).
The spelling of 4481 in words is "four thousand, four hundred eighty-one".
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