549845 has 8 divisors (see below), whose sum is σ = 663864. Its totient is φ = 437184.

The previous prime is 549839. The next prime is 549863. The reversal of 549845 is 548945.

549845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 28561 + 521284 = 169^2 + 722^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549845 - 2⁸ = 549589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187 + ... + 1583.

It is an arithmetic number, because the mean of its divisors is an integer number (82983).

2⁵⁴⁹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

549845 is a deficient number, since it is larger than the sum of its proper divisors (114019).

549845 is a wasteful number, since it uses less digits than its factorization.

549845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679.

The product of its digits is 28800, while the sum is 35.

The square root of 549845 is about 741.5153403673. The cubic root of 549845 is about 81.9244296826.

Subtracting from 549845 its reverse (548945), we obtain a square (900 = 30²).

The spelling of 549845 in words is "five hundred forty-nine thousand, eight hundred forty-five".