548121 has 16 divisors (see below), whose sum is σ = 856064. Its totient is φ = 305424.

The previous prime is 548117. The next prime is 548123. The reversal of 548121 is 121845.

It is not a de Polignac number, because 548121 - 2² = 548117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

548121 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (548123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (53504).

2⁵⁴⁸¹²¹ is an apocalyptic number.

It is an amenable number.

548121 is a deficient number, since it is larger than the sum of its proper divisors (307943).

548121 is a wasteful number, since it uses less digits than its factorization.

548121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660.

The product of its digits is 320, while the sum is 21.

The square root of 548121 is about 740.3519433351. The cubic root of 548121 is about 81.8387172921.

Adding to 548121 its reverse (121845), we get a palindrome (669966).

The spelling of 548121 in words is "five hundred forty-eight thousand, one hundred twenty-one".