101440042 has 8 divisors (see below), whose sum is σ = 165992832. Its totient is φ = 46109100.

The previous prime is 101440021. The next prime is 101440049. The reversal of 101440042 is 240044101.

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

It is a junction number, because it is equal to n+sod(n) for n = 101439998 and 101440025.

It is not an unprimeable number, because it can be changed into a prime (101440049) 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, 2305434 + ... + 2305477.

It is an arithmetic number, because the mean of its divisors is an integer number (20749104).

Almost surely, 2^101440042 is an apocalyptic number.

101440042 is a deficient number, since it is larger than the sum of its proper divisors (64552790).

101440042 is a wasteful number, since it uses less digits than its factorization.

101440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610924.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 101440042 is about 10071.7447346525. The cubic root of 101440042 is about 466.3763008876.

Adding to 101440042 its reverse (240044101), we get a palindrome (341484143).

The spelling of 101440042 in words is "one hundred one million, four hundred forty thousand, forty-two".