542205 has 12 divisors (see below), whose sum is σ = 939900. Its totient is φ = 289152.

The previous prime is 542197. The next prime is 542207. The reversal of 542205 is 502245.

It can be written as a sum of positive squares in 2 ways, for example, as 285156 + 257049 = 534^2 + 507^2 .

It is not a de Polignac number, because 542205 - 2³ = 542197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542207) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 5980 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (78325).

2⁵⁴²²⁰⁵ is an apocalyptic number.

It is an amenable number.

542205 is a deficient number, since it is larger than the sum of its proper divisors (397695).

542205 is a wasteful number, since it uses less digits than its factorization.

542205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12060 (or 12057 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 542205 is about 736.3457068524. The cubic root of 542205 is about 81.5432166947.

It can be divided in two parts, 542 and 205, that added together give a palindrome (747).

The spelling of 542205 in words is "five hundred forty-two thousand, two hundred five".