542845 has 8 divisors (see below), whose sum is σ = 656640. Its totient is φ = 430800.

The previous prime is 542837. The next prime is 542873. The reversal of 542845 is 548245.

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

It is not a de Polignac number, because 542845 - 2³ = 542837 is a prime.

542845 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 1114.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2⁵⁴²⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

542845 is a deficient number, since it is larger than the sum of its proper divisors (113795).

542845 is a wasteful number, since it uses less digits than its factorization.

542845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its digits is 6400, while the sum is 28.

The square root of 542845 is about 736.7801571704. The cubic root of 542845 is about 81.5752876756.

It can be divided in two parts, 54284 and 5, that added together give a square (54289 = 233²).

The spelling of 542845 in words is "five hundred forty-two thousand, eight hundred forty-five".