548566 has 4 divisors (see below), whose sum is σ = 822852. Its totient is φ = 274282.

The previous prime is 548557. The next prime is 548567. The reversal of 548566 is 665845.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665845 = 5 ⋅133169.

It is an Ulam number.

It is a plaindrome in base 12.

It is a congruent number.

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

548566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137140 + ... + 137143.

It is an arithmetic number, because the mean of its divisors is an integer number (205713).

2⁵⁴⁸⁵⁶⁶ is an apocalyptic number.

548566 is a deficient number, since it is larger than the sum of its proper divisors (274286).

548566 is a wasteful number, since it uses less digits than its factorization.

548566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274285.

The product of its digits is 28800, while the sum is 34.

The square root of 548566 is about 740.6524151044. The cubic root of 548566 is about 81.8608586186.

The spelling of 548566 in words is "five hundred forty-eight thousand, five hundred sixty-six".