142187738 has 32 divisors (see below), whose sum is σ = 266969088. Its totient is φ = 55177200.

The previous prime is 142187729. The next prime is 142187743. The reversal of 142187738 is 837781241.

It is a junction number, because it is equal to n+sod(n) for n = 142187695 and 142187704.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40031 + ... + 43437.

It is an arithmetic number, because the mean of its divisors is an integer number (8342784).

Almost surely, 2^142187738 is an apocalyptic number.

142187738 is a deficient number, since it is larger than the sum of its proper divisors (124781350).

142187738 is a wasteful number, since it uses less digits than its factorization.

142187738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698.

The product of its digits is 75264, while the sum is 41.

The square root of 142187738 is about 11924.2499973793. The cubic root of 142187738 is about 521.9401608814.

The spelling of 142187738 in words is "one hundred forty-two million, one hundred eighty-seven thousand, seven hundred thirty-eight".