101787842 has 16 divisors (see below), whose sum is σ = 166682040. Its totient is φ = 46334592.

The previous prime is 101787839. The next prime is 101787863. The reversal of 101787842 is 248787101.

It can be written as a sum of positive squares in 4 ways, for example, as 94109401 + 7678441 = 9701^2 + 2771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101787796 and 101787805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24917 + ... + 28712.

Almost surely, 2^101787842 is an apocalyptic number.

101787842 is a deficient number, since it is larger than the sum of its proper divisors (64894198).

101787842 is a wasteful number, since it uses less digits than its factorization.

101787842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53717.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 101787842 is about 10088.9960848441. The cubic root of 101787842 is about 466.9087029045.

The spelling of 101787842 in words is "one hundred one million, seven hundred eighty-seven thousand, eight hundred forty-two".