100505001 has 4 divisors (see below), whose sum is σ = 134006672. Its totient is φ = 67003332.

The previous prime is 100504991. The next prime is 100505011.

100505001 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (100504991) and next prime (100505011).

It is not a de Polignac number, because 100505001 - 2¹¹ = 100502953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100505011) 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 3 ways as a sum of consecutive naturals, for example, 16750831 + ... + 16750836.

It is an arithmetic number, because the mean of its divisors is an integer number (33501668).

Almost surely, 2^100505001 is an apocalyptic number.

It is an amenable number.

100505001 is a deficient number, since it is larger than the sum of its proper divisors (33501671).

100505001 is an equidigital number, since it uses as much as digits as its factorization.

100505001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33501670.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 100505001 is about 10025.2182519883. The cubic root of 100505001 is about 464.9389074555.

It can be divided in two parts, 10050 and 5001, that added together give a palindrome (15051).

The spelling of 100505001 in words is "one hundred million, five hundred five thousand, one".