542242111 has 4 divisors (see below), whose sum is σ = 559733824. Its totient is φ = 524750400.

The previous prime is 542242093. The next prime is 542242163. The reversal of 542242111 is 111242245.

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 542242111 - 2⁵ = 542242079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542242171) 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, 8745810 + ... + 8745871.

It is an arithmetic number, because the mean of its divisors is an integer number (139933456).

Almost surely, 2^542242111 is an apocalyptic number.

542242111 is a deficient number, since it is larger than the sum of its proper divisors (17491713).

542242111 is a wasteful number, since it uses less digits than its factorization.

542242111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17491712.

The product of its digits is 640, while the sum is 22.

The square root of 542242111 is about 23286.0926520531. The cubic root of 542242111 is about 815.4507704964.

Adding to 542242111 its reverse (111242245), we get a palindrome (653484356).

The spelling of 542242111 in words is "five hundred forty-two million, two hundred forty-two thousand, one hundred eleven".