545121 has 12 divisors (see below), whose sum is σ = 809172. Its totient is φ = 353376.

The previous prime is 545117. The next prime is 545131. The reversal of 545121 is 121545.

545121 is a `hidden beast` number, since 545 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 314721 = 480^2 + 561^2 .

It is not a de Polignac number, because 545121 - 2² = 545117 is a prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 545094 and 545103.

It is not an unprimeable number, because it can be changed into a prime (545131) 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, 486 + ... + 1151.

It is an arithmetic number, because the mean of its divisors is an integer number (67431).

2⁵⁴⁵¹²¹ is an apocalyptic number.

It is an amenable number.

545121 is a deficient number, since it is larger than the sum of its proper divisors (264051).

545121 is a wasteful number, since it uses less digits than its factorization.

545121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 1677 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 545121 is about 738.3231000043. The cubic root of 545121 is about 81.6891363041.

Adding to 545121 its reverse (121545), we get a palindrome (666666).

It can be divided in two parts, 545 and 121, that added together give a palindrome (666).

The spelling of 545121 in words is "five hundred forty-five thousand, one hundred twenty-one".