104020405 has 8 divisors (see below), whose sum is σ = 126060984. Its totient is φ = 82392000.

The previous prime is 104020393. The next prime is 104020409. The reversal of 104020405 is 504020401.

It can be written as a sum of positive squares in 4 ways, for example, as 61496964 + 42523441 = 7842^2 + 6521^2 .

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

It is not a de Polignac number, because 104020405 - 2⁷ = 104020277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104020409) 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, 102486 + ... + 103495.

It is an arithmetic number, because the mean of its divisors is an integer number (15757623).

Almost surely, 2^104020405 is an apocalyptic number.

It is an amenable number.

104020405 is a deficient number, since it is larger than the sum of its proper divisors (22040579).

104020405 is a wasteful number, since it uses less digits than its factorization.

104020405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206087.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 104020405 is about 10199.0394155528. The cubic root of 104020405 is about 470.2976912921.

Adding to 104020405 its reverse (504020401), we get a palindrome (608040806).

The spelling of 104020405 in words is "one hundred four million, twenty thousand, four hundred five".