100281305 has 8 divisors (see below), whose sum is σ = 120838344. Its totient is φ = 79891200.

The previous prime is 100281287. The next prime is 100281361. The reversal of 100281305 is 503182001.

It can be written as a sum of positive squares in 4 ways, for example, as 18215824 + 82065481 = 4268^2 + 9059^2 .

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

It is not a de Polignac number, because 100281305 - 2⁶ = 100281241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 40406 + ... + 42815.

It is an arithmetic number, because the mean of its divisors is an integer number (15104793).

Almost surely, 2^100281305 is an apocalyptic number.

It is an amenable number.

100281305 is a deficient number, since it is larger than the sum of its proper divisors (20557039).

100281305 is an equidigital number, since it uses as much as digits as its factorization.

100281305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83467.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 100281305 is about 10014.0553723254. The cubic root of 100281305 is about 464.5937099351.

The spelling of 100281305 in words is "one hundred million, two hundred eighty-one thousand, three hundred five".