548521 has 2 divisors, whose sum is σ = 548522. Its totient is φ = 548520.

The previous prime is 548519. The next prime is 548533. The reversal of 548521 is 125845.

548521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 132496 = 645^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 548521 - 2¹ = 548519 is a prime.

Together with 548519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (548501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274260 + 274261.

It is an arithmetic number, because the mean of its divisors is an integer number (274261).

2⁵⁴⁸⁵²¹ is an apocalyptic number.

It is an amenable number.

548521 is a deficient number, since it is larger than the sum of its proper divisors (1).

548521 is an equidigital number, since it uses as much as digits as its factorization.

548521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 25.

The square root of 548521 is about 740.6220358590. The cubic root of 548521 is about 81.8586201524.

The spelling of 548521 in words is "five hundred forty-eight thousand, five hundred twenty-one".