42112543 has 4 divisors (see below), whose sum is σ = 45940968. Its totient is φ = 38284120.

The previous prime is 42112537. The next prime is 42112559. The reversal of 42112543 is 34521124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42112543 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 (42112513) 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, 1914196 + ... + 1914217.

It is an arithmetic number, because the mean of its divisors is an integer number (11485242).

Almost surely, 2^42112543 is an apocalyptic number.

42112543 is a deficient number, since it is larger than the sum of its proper divisors (3828425).

42112543 is a wasteful number, since it uses less digits than its factorization.

42112543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828424.

The product of its digits is 960, while the sum is 22.

The square root of 42112543 is about 6489.4177704937. The cubic root of 42112543 is about 347.9128657303.

Adding to 42112543 its reverse (34521124), we get a palindrome (76633667).

The spelling of 42112543 in words is "forty-two million, one hundred twelve thousand, five hundred forty-three".