42100138 has 8 divisors (see below), whose sum is σ = 63356832. Its totient is φ = 20981196.

The previous prime is 42100111. The next prime is 42100151. The reversal of 42100138 is 83100124.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33670 + ... + 34897.

It is an arithmetic number, because the mean of its divisors is an integer number (7919604).

Almost surely, 2^42100138 is an apocalyptic number.

42100138 is a deficient number, since it is larger than the sum of its proper divisors (21256694).

42100138 is a wasteful number, since it uses less digits than its factorization.

42100138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68876.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 42100138 is about 6488.4619132734. The cubic root of 42100138 is about 347.8787010640.

The spelling of 42100138 in words is "forty-two million, one hundred thousand, one hundred thirty-eight".