143438842 has 4 divisors (see below), whose sum is σ = 215158266. Its totient is φ = 71719420.

The previous prime is 143438839. The next prime is 143438849. The reversal of 143438842 is 248834341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248834341 = 7 ⋅35547763.

It can be written as a sum of positive squares in only one way, i.e., 143065521 + 373321 = 11961^2 + 611^2 .

It is not an unprimeable number, because it can be changed into a prime (143438849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35859709 + ... + 35859712.

Almost surely, 2^143438842 is an apocalyptic number.

143438842 is a deficient number, since it is larger than the sum of its proper divisors (71719424).

143438842 is an equidigital number, since it uses as much as digits as its factorization.

143438842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71719423.

The product of its digits is 73728, while the sum is 37.

The square root of 143438842 is about 11976.5955930723. The cubic root of 143438842 is about 523.4665360241.

The spelling of 143438842 in words is "one hundred forty-three million, four hundred thirty-eight thousand, eight hundred forty-two".