100205045 has 8 divisors (see below), whose sum is σ = 120300120. Its totient is φ = 80128000.

The previous prime is 100205023. The next prime is 100205047. The reversal of 100205045 is 540502001.

It can be written as a sum of positive squares in 4 ways, for example, as 24964 + 100180081 = 158^2 + 10009^2 .

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

It is not a de Polignac number, because 100205045 - 2⁶ = 100204981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100205047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17501 + ... + 22509.

It is an arithmetic number, because the mean of its divisors is an integer number (15037515).

Almost surely, 2^100205045 is an apocalyptic number.

It is an amenable number.

100205045 is a deficient number, since it is larger than the sum of its proper divisors (20095075).

100205045 is an equidigital number, since it uses as much as digits as its factorization.

100205045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9015.

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

The square root of 100205045 is about 10010.2469999496. The cubic root of 100205045 is about 464.4759116372.

Adding to 100205045 its reverse (540502001), we get a palindrome (640707046).

The spelling of 100205045 in words is "one hundred million, two hundred five thousand, forty-five".