100240505 has 8 divisors (see below), whose sum is σ = 120507912. Its totient is φ = 80046208.

The previous prime is 100240499. The next prime is 100240529. The reversal of 100240505 is 505042001.

It can be written as a sum of positive squares in 4 ways, for example, as 8904256 + 91336249 = 2984^2 + 9557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100240505 - 2¹⁰ = 100239481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15212 + ... + 20781.

It is an arithmetic number, because the mean of its divisors is an integer number (15063489).

Almost surely, 2^100240505 is an apocalyptic number.

It is an amenable number.

100240505 is a deficient number, since it is larger than the sum of its proper divisors (20267407).

100240505 is an equidigital number, since it uses as much as digits as its factorization.

100240505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36555.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 100240505 is about 10012.0180283497. The cubic root of 100240505 is about 464.5306938869.

Adding to 100240505 its reverse (505042001), we get a palindrome (605282506).

The spelling of 100240505 in words is "one hundred million, two hundred forty thousand, five hundred five".