543121 has 4 divisors (see below), whose sum is σ = 544752. Its totient is φ = 541492.

The previous prime is 543113. The next prime is 543131. The reversal of 543121 is 121345.

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 543121 - 2³ = 543113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 543095 and 543104.

It is not an unprimeable number, because it can be changed into a prime (543131) 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 3 ways as a sum of consecutive naturals, for example, 115 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (136188).

2⁵⁴³¹²¹ is an apocalyptic number.

It is an amenable number.

543121 is a deficient number, since it is larger than the sum of its proper divisors (1631).

543121 is a wasteful number, since it uses less digits than its factorization.

543121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630.

The product of its digits is 120, while the sum is 16.

The square root of 543121 is about 736.9674348301. The cubic root of 543121 is about 81.5891105070.

Adding to 543121 its reverse (121345), we get a palindrome (664466).

It can be divided in two parts, 543 and 121, that multiplied together give a triangular number (65703 = T₃₆₂).

The spelling of 543121 in words is "five hundred forty-three thousand, one hundred twenty-one".