100000042 has 4 divisors (see below), whose sum is σ = 150000066. Its totient is φ = 50000020.

The previous prime is 100000039. The next prime is 100000049. The reversal of 100000042 is 240000001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 39300361 = 7791^2 + 6269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99999980 and 100000034.

It is not an unprimeable number, because it can be changed into a prime (100000049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25000009 + ... + 25000012.

Almost surely, 2^100000042 is an apocalyptic number.

100000042 is a deficient number, since it is larger than the sum of its proper divisors (50000024).

100000042 is an equidigital number, since it uses as much as digits as its factorization.

100000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50000023.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 100000042 is about 10000.0020999998. The cubic root of 100000042 is about 464.1589483435.

Adding to 100000042 its reverse (240000001), we get a palindrome (340000043).

The spelling of 100000042 in words is "one hundred million, forty-two", and thus it is an aban number.