100140442 has 4 divisors (see below), whose sum is σ = 150210666. Its totient is φ = 50070220.

The previous prime is 100140437. The next prime is 100140449. The reversal of 100140442 is 244041001.

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., 83338641 + 16801801 = 9129^2 + 4099^2 .

It is not an unprimeable number, because it can be changed into a prime (100140449) 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 as a sum of consecutive naturals, namely, 25035109 + ... + 25035112.

Almost surely, 2^100140442 is an apocalyptic number.

100140442 is a deficient number, since it is larger than the sum of its proper divisors (50070224).

100140442 is an equidigital number, since it uses as much as digits as its factorization.

100140442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50070223.

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

The square root of 100140442 is about 10007.0196362354. The cubic root of 100140442 is about 464.3760730575.

Adding to 100140442 its reverse (244041001), we get a palindrome (344181443).

The spelling of 100140442 in words is "one hundred million, one hundred forty thousand, four hundred forty-two".