549505 has 16 divisors (see below), whose sum is σ = 733824. Its totient is φ = 391680.

The previous prime is 549503. The next prime is 549509. The reversal of 549505 is 505945.

It is not a de Polignac number, because 549505 - 2¹ = 549503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5284 + ... + 5386.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2⁵⁴⁹⁵⁰⁵ is an apocalyptic number.

549505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

549505 is a deficient number, since it is larger than the sum of its proper divisors (184319).

549505 is a wasteful number, since it uses less digits than its factorization.

549505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 549505 is about 741.2860446548. The cubic root of 549505 is about 81.9075400444.

It can be divided in two parts, 54 and 9505, that added together give a palindrome (9559).

The spelling of 549505 in words is "five hundred forty-nine thousand, five hundred five".