100140172 has 12 divisors (see below), whose sum is σ = 191176776. Its totient is φ = 45518240.

The previous prime is 100140133. The next prime is 100140179. The reversal of 100140172 is 271041001.

It is not an unprimeable number, because it can be changed into a prime (100140179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137913 + ... + 1138000.

It is an arithmetic number, because the mean of its divisors is an integer number (15931398).

Almost surely, 2^100140172 is an apocalyptic number.

It is an amenable number.

100140172 is a deficient number, since it is larger than the sum of its proper divisors (91036604).

100140172 is a wasteful number, since it uses less digits than its factorization.

100140172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275928 (or 2275926 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 100140172 is about 10007.0061456961. The cubic root of 100140172 is about 464.3756557048.

Adding to 100140172 its reverse (271041001), we get a palindrome (371181173).

The spelling of 100140172 in words is "one hundred million, one hundred forty thousand, one hundred seventy-two".