542805 has 8 divisors (see below), whose sum is σ = 868512. Its totient is φ = 289488.

The previous prime is 542797. The next prime is 542821. The reversal of 542805 is 508245.

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

It is not a de Polignac number, because 542805 - 2³ = 542797 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18079 + ... + 18108.

It is an arithmetic number, because the mean of its divisors is an integer number (108564).

2⁵⁴²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

542805 is a deficient number, since it is larger than the sum of its proper divisors (325707).

542805 is a wasteful number, since it uses less digits than its factorization.

542805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36195.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 542805 is about 736.7530115310. The cubic root of 542805 is about 81.5732839780.

It can be divided in two parts, 54280 and 5, that added together give a triangular number (54285 = T₃₂₉).

The spelling of 542805 in words is "five hundred forty-two thousand, eight hundred five".