100006505 has 4 divisors (see below), whose sum is σ = 120007812. Its totient is φ = 80005200.

The previous prime is 100006493. The next prime is 100006547. The reversal of 100006505 is 505600001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60668521 + 39337984 = 7789^2 + 6272^2 .

It is a de Polignac number, because none of the positive numbers 2^k-100006505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10000646 + ... + 10000655.

It is an arithmetic number, because the mean of its divisors is an integer number (30001953).

Almost surely, 2^100006505 is an apocalyptic number.

It is an amenable number.

100006505 is a deficient number, since it is larger than the sum of its proper divisors (20001307).

100006505 is an equidigital number, since it uses as much as digits as its factorization.

100006505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001306.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 100006505 is about 10000.3252447108. The cubic root of 100006505 is about 464.1689476548.

Adding to 100006505 its reverse (505600001), we get a palindrome (605606506).

The spelling of 100006505 in words is "one hundred million, six thousand, five hundred five".