549081 has 27 divisors (see below), whose sum is σ = 906399. Its totient is φ = 320112.

The previous prime is 549071. The next prime is 549089. The reversal of 549081 is 180945.

549081 = 1³ + 2³ + ... + 38³.

The square root of 549081 is 741.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 81225 + 467856 = 285^2 + 684^2 .

It is not a de Polignac number, because 549081 - 2⁷ = 548953 is a prime.

It is a super-2 number, since 2×549081² = 602979889122, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549081.

It is not an unprimeable number, because it can be changed into a prime (549089) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 28890 + ... + 28908.

2⁵⁴⁹⁰⁸¹ is an apocalyptic number.

549081 is the 741-st square number.

549081 is the 371-st centered octagonal number.

It is an amenable number.

549081 is a deficient number, since it is larger than the sum of its proper divisors (357318).

549081 is a wasteful number, since it uses less digits than its factorization.

549081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The cubic root of 549081 is about 81.8864679079.

The spelling of 549081 in words is "five hundred forty-nine thousand, eighty-one".