142381906 has 8 divisors (see below), whose sum is σ = 213724800. Its totient is φ = 71140308.

The previous prime is 142381861. The next prime is 142381931. The reversal of 142381906 is 609183241.

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

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 3 ways as a sum of consecutive naturals, for example, 21706 + ... + 27493.

It is an arithmetic number, because the mean of its divisors is an integer number (26715600).

Almost surely, 2^142381906 is an apocalyptic number.

142381906 is a deficient number, since it is larger than the sum of its proper divisors (71342894).

142381906 is a wasteful number, since it uses less digits than its factorization.

142381906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50648.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 142381906 is about 11932.3889477338. The cubic root of 142381906 is about 522.1776356045.

The spelling of 142381906 in words is "one hundred forty-two million, three hundred eighty-one thousand, nine hundred six".