542243 has 8 divisors (see below), whose sum is σ = 595728. Its totient is φ = 490464.

The previous prime is 542237. The next prime is 542251. The reversal of 542243 is 342245.

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

It is not a de Polignac number, because 542243 - 2⁸ = 541987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542263) by changing a digit.

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, 296 + ... + 1082.

It is an arithmetic number, because the mean of its divisors is an integer number (74466).

2⁵⁴²²⁴³ is an apocalyptic number.

542243 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

542243 is a deficient number, since it is larger than the sum of its proper divisors (53485).

542243 is a wasteful number, since it uses less digits than its factorization.

542243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 960, while the sum is 20.

The square root of 542243 is about 736.3715094978. The cubic root of 542243 is about 81.5451216137.

Adding to 542243 its reverse (342245), we get a palindrome (884488).

The spelling of 542243 in words is "five hundred forty-two thousand, two hundred forty-three".