100130128 has 30 divisors (see below), whose sum is σ = 225677706. Its totient is φ = 42912576.

The previous prime is 100130123. The next prime is 100130141. The reversal of 100130128 is 821031001.

It can be written as a sum of positive squares in only one way, i.e., 98247744 + 1882384 = 9912^2 + 1372^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100130123) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 63075 + ... + 64642.

Almost surely, 2^100130128 is an apocalyptic number.

It is an amenable number.

100130128 is an abundant number, since it is smaller than the sum of its proper divisors (125547578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100130128 is a wasteful number, since it uses less digits than its factorization.

100130128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127739 (or 127726 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 100130128 is about 10006.5042847140. The cubic root of 100130128 is about 464.3601296512.

Adding to 100130128 its reverse (821031001), we get a palindrome (921161129).

The spelling of 100130128 in words is "one hundred million, one hundred thirty thousand, one hundred twenty-eight".