542724891 has 4 divisors (see below), whose sum is σ = 723633192. Its totient is φ = 361816592.

The previous prime is 542724883. The next prime is 542724943. The reversal of 542724891 is 198427245.

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

It is a cyclic number.

It is not a de Polignac number, because 542724891 - 2³ = 542724883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542724811) 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 in 3 ways as a sum of consecutive naturals, for example, 90454146 + ... + 90454151.

It is an arithmetic number, because the mean of its divisors is an integer number (180908298).

Almost surely, 2^542724891 is an apocalyptic number.

542724891 is a deficient number, since it is larger than the sum of its proper divisors (180908301).

542724891 is a wasteful number, since it uses less digits than its factorization.

542724891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180908300.

The product of its digits is 161280, while the sum is 42.

The square root of 542724891 is about 23296.4566189796. The cubic root of 542724891 is about 815.6927082676.

It can be divided in two parts, 54 and 2724891, that added together give a triangular number (2724945 = T₂₃₃₄).

The spelling of 542724891 in words is "five hundred forty-two million, seven hundred twenty-four thousand, eight hundred ninety-one".