142142738 has 8 divisors (see below), whose sum is σ = 213369660. Its totient is φ = 71019520.

The previous prime is 142142731. The next prime is 142142747. The reversal of 142142738 is 837241241.

It can be written as a sum of positive squares in 2 ways, for example, as 140019889 + 2122849 = 11833^2 + 1457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×142142738² = 40409115932273288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142142731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22403 + ... + 28038.

Almost surely, 2^142142738 is an apocalyptic number.

142142738 is a deficient number, since it is larger than the sum of its proper divisors (71226922).

142142738 is a wasteful number, since it uses less digits than its factorization.

142142738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51852.

The product of its digits is 10752, while the sum is 32.

The square root of 142142738 is about 11922.3629369349. The cubic root of 142142738 is about 521.8850933447.

Adding to 142142738 its reverse (837241241), we get a palindrome (979383979).

The spelling of 142142738 in words is "one hundred forty-two million, one hundred forty-two thousand, seven hundred thirty-eight".