100388242 has 4 divisors (see below), whose sum is σ = 150582366. Its totient is φ = 50194120.

The previous prime is 100388221. The next prime is 100388279. The reversal of 100388242 is 242883001.

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., 58384881 + 42003361 = 7641^2 + 6481^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100388242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25097059 + ... + 25097062.

Almost surely, 2^100388242 is an apocalyptic number.

100388242 is a deficient number, since it is larger than the sum of its proper divisors (50194124).

100388242 is an equidigital number, since it uses as much as digits as its factorization.

100388242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50194123.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 100388242 is about 10019.3932950054. The cubic root of 100388242 is about 464.7587942385.

The spelling of 100388242 in words is "one hundred million, three hundred eighty-eight thousand, two hundred forty-two".