548561 has 4 divisors (see below), whose sum is σ = 590772. Its totient is φ = 506352.

The previous prime is 548557. The next prime is 548567. The reversal of 548561 is 165845.

It is a happy number.

548561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65536 + 483025 = 256^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 548561 - 2² = 548557 is a prime.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (548567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21086 + ... + 21111.

It is an arithmetic number, because the mean of its divisors is an integer number (147693).

2⁵⁴⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

548561 is a deficient number, since it is larger than the sum of its proper divisors (42211).

548561 is a wasteful number, since it uses less digits than its factorization.

548561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42210.

The product of its digits is 4800, while the sum is 29.

The square root of 548561 is about 740.6490396942. The cubic root of 548561 is about 81.8606099062.

The spelling of 548561 in words is "five hundred forty-eight thousand, five hundred sixty-one".