542042443 has 4 divisors (see below), whose sum is σ = 543578328. Its totient is φ = 540506560.

The previous prime is 542042437. The next prime is 542042453. The reversal of 542042443 is 344240245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344240245 = 5 ⋅68848049.

It is a cyclic number.

It is not a de Polignac number, because 542042443 - 2²⁵ = 508488011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542042453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767413 + ... + 768118.

It is an arithmetic number, because the mean of its divisors is an integer number (135894582).

Almost surely, 2^542042443 is an apocalyptic number.

542042443 is a deficient number, since it is larger than the sum of its proper divisors (1535885).

542042443 is a wasteful number, since it uses less digits than its factorization.

542042443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535884.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 542042443 is about 23281.8049772779. The cubic root of 542042443 is about 815.3506679715.

Adding to 542042443 its reverse (344240245), we get a palindrome (886282688).

The spelling of 542042443 in words is "five hundred forty-two million, forty-two thousand, four hundred forty-three".