142839842 has 4 divisors (see below), whose sum is σ = 214259766. Its totient is φ = 71419920.

The previous prime is 142839817. The next prime is 142839863. The reversal of 142839842 is 248938241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248938241 = 1549 ⋅160709.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 11485321 = 11461^2 + 3389^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 142839842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35709959 + ... + 35709962.

Almost surely, 2^142839842 is an apocalyptic number.

142839842 is a deficient number, since it is larger than the sum of its proper divisors (71419924).

142839842 is an equidigital number, since it uses as much as digits as its factorization.

142839842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71419923.

The product of its digits is 110592, while the sum is 41.

The square root of 142839842 is about 11951.5623246503. The cubic root of 142839842 is about 522.7368546810.

The spelling of 142839842 in words is "one hundred forty-two million, eight hundred thirty-nine thousand, eight hundred forty-two".