545321 has 12 divisors (see below), whose sum is σ = 656640. Its totient is φ = 451080.

The previous prime is 545291. The next prime is 545329. The reversal of 545321 is 123545.

It is not a de Polignac number, because 545321 - 2⁶ = 545257 is a prime.

It is a super-3 number, since 3×545321³ = 486494485740333483, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545293 and 545302.

It is not an unprimeable number, because it can be changed into a prime (545329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1340 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁵⁴⁵³²¹ is an apocalyptic number.

It is an amenable number.

545321 is a deficient number, since it is larger than the sum of its proper divisors (111319).

545321 is a wasteful number, since it uses less digits than its factorization.

545321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 397 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 545321 is about 738.4585296413. The cubic root of 545321 is about 81.6991254194.

Adding to 545321 its reverse (123545), we get a palindrome (668866).

The spelling of 545321 in words is "five hundred forty-five thousand, three hundred twenty-one".