142544138 has 32 divisors (see below), whose sum is σ = 245956608. Its totient is φ = 61354800.

The previous prime is 142544123. The next prime is 142544161. The reversal of 142544138 is 831445241.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29831 + ... + 34277.

It is an arithmetic number, because the mean of its divisors is an integer number (7686144).

Almost surely, 2^142544138 is an apocalyptic number.

142544138 is a deficient number, since it is larger than the sum of its proper divisors (103412470).

142544138 is a wasteful number, since it uses less digits than its factorization.

142544138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538.

The product of its digits is 15360, while the sum is 32.

The square root of 142544138 is about 11939.1849805588. The cubic root of 142544138 is about 522.3758859070.

Adding to 142544138 its reverse (831445241), we get a palindrome (973989379).

The spelling of 142544138 in words is "one hundred forty-two million, five hundred forty-four thousand, one hundred thirty-eight".