542566 has 8 divisors (see below), whose sum is σ = 826200. Its totient is φ = 267168.

The previous prime is 542557. The next prime is 542567. The reversal of 542566 is 665245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542567) 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, 1891 + ... + 2158.

It is an arithmetic number, because the mean of its divisors is an integer number (103275).

2⁵⁴²⁵⁶⁶ is an apocalyptic number.

542566 is a deficient number, since it is larger than the sum of its proper divisors (283634).

542566 is a wasteful number, since it uses less digits than its factorization.

542566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118.

The product of its digits is 7200, while the sum is 28.

The square root of 542566 is about 736.5907954896. The cubic root of 542566 is about 81.5613098332.

The spelling of 542566 in words is "five hundred forty-two thousand, five hundred sixty-six".