104020505 has 8 divisors (see below), whose sum is σ = 128198472. Its totient is φ = 80967168.

The previous prime is 104020487. The next prime is 104020517. The reversal of 104020505 is 505020401.

It can be written as a sum of positive squares in 4 ways, for example, as 33779344 + 70241161 = 5812^2 + 8381^2 .

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 104020505 - 2¹⁶ = 103954969 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280952 + ... + 281321.

It is an arithmetic number, because the mean of its divisors is an integer number (16024809).

Almost surely, 2^104020505 is an apocalyptic number.

It is an amenable number.

104020505 is a deficient number, since it is larger than the sum of its proper divisors (24177967).

104020505 is an equidigital number, since it uses as much as digits as its factorization.

104020505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562315.

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

The square root of 104020505 is about 10199.0443179741. The cubic root of 104020505 is about 470.2978419989.

Adding to 104020505 its reverse (505020401), we get a palindrome (609040906).

The spelling of 104020505 in words is "one hundred four million, twenty thousand, five hundred five".