100040042 has 8 divisors (see below), whose sum is σ = 150389796. Its totient is φ = 49910112.

The previous prime is 100040023. The next prime is 100040051. The reversal of 100040042 is 240040001.

It can be written as a sum of positive squares in 2 ways, for example, as 99820081 + 219961 = 9991^2 + 469^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53813 + ... + 55640.

Almost surely, 2^100040042 is an apocalyptic number.

100040042 is a deficient number, since it is larger than the sum of its proper divisors (50349754).

100040042 is a wasteful number, since it uses less digits than its factorization.

100040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109912.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 100040042 is about 10002.0018996199. The cubic root of 100040042 is about 464.2208279274.

Adding to 100040042 its reverse (240040001), we get a palindrome (340080043).

The spelling of 100040042 in words is "one hundred million, forty thousand, forty-two".