142439543 has 4 divisors (see below), whose sum is σ = 142658328. Its totient is φ = 142220760.

The previous prime is 142439533. The next prime is 142439569. The reversal of 142439543 is 345934241.

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 142439543 - 2⁴ = 142439527 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 (142439533) 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, 108413 + ... + 109718.

It is an arithmetic number, because the mean of its divisors is an integer number (35664582).

Almost surely, 2^142439543 is an apocalyptic number.

142439543 is a deficient number, since it is larger than the sum of its proper divisors (218785).

142439543 is an equidigital number, since it uses as much as digits as its factorization.

142439543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218784.

The product of its digits is 51840, while the sum is 35.

The square root of 142439543 is about 11934.8038525985. The cubic root of 142439543 is about 522.2480862515.

It can be divided in two parts, 142439 and 543, that multiplied together give a palindrome (77344377).

The spelling of 142439543 in words is "one hundred forty-two million, four hundred thirty-nine thousand, five hundred forty-three".