549745 has 16 divisors (see below), whose sum is σ = 766080. Its totient is φ = 370944.

The previous prime is 549739. The next prime is 549749. The reversal of 549745 is 547945.

It is not a de Polignac number, because 549745 - 2³ = 549737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549745.

It is not an unprimeable number, because it can be changed into a prime (549749) 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, 3886 + ... + 4024.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁵⁴⁹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

549745 is a deficient number, since it is larger than the sum of its proper divisors (216335).

549745 is a wasteful number, since it uses less digits than its factorization.

549745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its digits is 25200, while the sum is 34.

The square root of 549745 is about 741.4479078128. The cubic root of 549745 is about 81.9194628649.

The spelling of 549745 in words is "five hundred forty-nine thousand, seven hundred forty-five".