100440142 has 16 divisors (see below), whose sum is σ = 164546352. Its totient is φ = 45601920.

The previous prime is 100440133. The next prime is 100440143. The reversal of 100440142 is 241044001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100440143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21958 + ... + 26134.

It is an arithmetic number, because the mean of its divisors is an integer number (10284147).

Almost surely, 2^100440142 is an apocalyptic number.

100440142 is a deficient number, since it is larger than the sum of its proper divisors (64106210).

100440142 is a wasteful number, since it uses less digits than its factorization.

100440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283.

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

The square root of 100440142 is about 10021.9829375229. The cubic root of 100440142 is about 464.8388727594.

Adding to 100440142 its reverse (241044001), we get a palindrome (341484143).

The spelling of 100440142 in words is "one hundred million, four hundred forty thousand, one hundred forty-two".