100500001 has 16 divisors (see below), whose sum is σ = 117238528. Its totient is φ = 84369600.

The previous prime is 100499999. The next prime is 100500007. The reversal of 100500001 is 100005001.

It is not a de Polignac number, because 100500001 - 2¹ = 100499999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100500007) 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 in 15 ways as a sum of consecutive naturals, for example, 158956 + ... + 159586.

It is an arithmetic number, because the mean of its divisors is an integer number (7327408).

Almost surely, 2^100500001 is an apocalyptic number.

It is an amenable number.

100500001 is a deficient number, since it is larger than the sum of its proper divisors (16738527).

100500001 is an equidigital number, since it uses as much as digits as its factorization.

100500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its (nonzero) digits is 5, while the sum is 7.

The square root of 100500001 is about 10024.9688777572. The cubic root of 100500001 is about 464.9311972816.

Adding to 100500001 its reverse (100005001), we get a palindrome (200505002).

The spelling of 100500001 in words is "one hundred million, five hundred thousand, one".