142243543 has 4 divisors (see below), whose sum is σ = 153185368. Its totient is φ = 131301720.

The previous prime is 142243537. The next prime is 142243547. The reversal of 142243543 is 345342241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345342241 = 2693 ⋅128237.

It is a cyclic number.

It is not a de Polignac number, because 142243543 - 2⁵ = 142243511 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 (142243547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5470893 + ... + 5470918.

It is an arithmetic number, because the mean of its divisors is an integer number (38296342).

Almost surely, 2^142243543 is an apocalyptic number.

142243543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

142243543 is a deficient number, since it is larger than the sum of its proper divisors (10941825).

142243543 is a wasteful number, since it uses less digits than its factorization.

142243543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10941824.

The product of its digits is 11520, while the sum is 28.

The square root of 142243543 is about 11926.5897472832. The cubic root of 142243543 is about 522.0084346097.

Adding to 142243543 its reverse (345342241), we get a palindrome (487585784).

The spelling of 142243543 in words is "one hundred forty-two million, two hundred forty-three thousand, five hundred forty-three".