549945 has 36 divisors (see below), whose sum is σ = 1058148. Its totient is φ = 264000.

The previous prime is 549943. The next prime is 549949.

549945 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 393129 + 156816 = 627^2 + 396^2 .

It is not a de Polignac number, because 549945 - 2¹ = 549943 is a prime.

Its product of digits (32400) is a multiple of the sum of its prime divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549943) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5395 + ... + 5495.

It is an arithmetic number, because the mean of its divisors is an integer number (29393).

2⁵⁴⁹⁹⁴⁵ is an apocalyptic number.

549945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

549945 is a deficient number, since it is larger than the sum of its proper divisors (508203).

549945 is a wasteful number, since it uses less digits than its factorization.

549945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 120 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 549945 is about 741.5827667901. The cubic root of 549945 is about 81.9293958981.

It can be divided in two parts, 54 and 9945, that added together give a palindrome (9999).

The spelling of 549945 in words is "five hundred forty-nine thousand, nine hundred forty-five".