549281 has 2 divisors, whose sum is σ = 549282. Its totient is φ = 549280.

The previous prime is 549259. The next prime is 549313. The reversal of 549281 is 182945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 1681 = 740^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 549281 - 2¹⁸ = 287137 is a prime.

It is a super-2 number, since 2×549281² = 603419233922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (549221) 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, 274640 + 274641.

It is an arithmetic number, because the mean of its divisors is an integer number (274641).

2⁵⁴⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

549281 is a deficient number, since it is larger than the sum of its proper divisors (1).

549281 is an equidigital number, since it uses as much as digits as its factorization.

549281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 549281 is about 741.1349404798. The cubic root of 549281 is about 81.8964089460.

The spelling of 549281 in words is "five hundred forty-nine thousand, two hundred eighty-one".