42342543 has 12 divisors (see below), whose sum is σ = 61316320. Its totient is φ = 28156896.

The previous prime is 42342539. The next prime is 42342577. The reversal of 42342543 is 34524324.

It is not a de Polignac number, because 42342543 - 2² = 42342539 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 (42342043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2071 + ... + 9432.

Almost surely, 2^42342543 is an apocalyptic number.

42342543 is a deficient number, since it is larger than the sum of its proper divisors (18973777).

42342543 is a wasteful number, since it uses less digits than its factorization.

42342543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11918 (or 11915 counting only the distinct ones).

The product of its digits is 11520, while the sum is 27.

The square root of 42342543 is about 6507.1147984341. The cubic root of 42342543 is about 348.5450979666.

Adding to 42342543 its reverse (34524324), we get a palindrome (76866867).

The spelling of 42342543 in words is "forty-two million, three hundred forty-two thousand, five hundred forty-three".