549501 has 4 divisors (see below), whose sum is σ = 732672. Its totient is φ = 366332.

The previous prime is 549481. The next prime is 549503. The reversal of 549501 is 105945.

549501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 549501 - 2¹¹ = 547453 is a prime.

It is a D-number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 91581 + ... + 91586.

It is an arithmetic number, because the mean of its divisors is an integer number (183168).

2⁵⁴⁹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

549501 is a deficient number, since it is larger than the sum of its proper divisors (183171).

549501 is a wasteful number, since it uses less digits than its factorization.

549501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183170.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 549501 is about 741.2833466361. The cubic root of 549501 is about 81.9073413013.

Subtracting from 549501 its reverse (105945), we obtain a square (443556 = 666²).

The spelling of 549501 in words is "five hundred forty-nine thousand, five hundred one".