542730842 has 4 divisors (see below), whose sum is σ = 814096266. Its totient is φ = 271365420.

The previous prime is 542730841. The next prime is 542730883. The reversal of 542730842 is 248037245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 317160481 + 225570361 = 17809^2 + 15019^2 .

It is not an unprimeable number, because it can be changed into a prime (542730841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135682709 + ... + 135682712.

Almost surely, 2^542730842 is an apocalyptic number.

542730842 is a deficient number, since it is larger than the sum of its proper divisors (271365424).

542730842 is a wasteful number, since it uses less digits than its factorization.

542730842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271365423.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 542730842 is about 23296.5843419159. The cubic root of 542730842 is about 815.6956896244.

The spelling of 542730842 in words is "five hundred forty-two million, seven hundred thirty thousand, eight hundred forty-two".