104391405 has 12 divisors (see below), whose sum is σ = 180945180. Its totient is φ = 55675392.

The previous prime is 104391403. The next prime is 104391409. The reversal of 104391405 is 504193401.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 26440164 = 8829^2 + 5142^2 .

It is not a de Polignac number, because 104391405 - 2¹ = 104391403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104391403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1159860 + ... + 1159949.

It is an arithmetic number, because the mean of its divisors is an integer number (15078765).

Almost surely, 2^104391405 is an apocalyptic number.

104391405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

104391405 is a deficient number, since it is larger than the sum of its proper divisors (76553775).

104391405 is a wasteful number, since it uses less digits than its factorization.

104391405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319820 (or 2319817 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 104391405 is about 10217.2112144166. The cubic root of 104391405 is about 470.8561503722.

The spelling of 104391405 in words is "one hundred four million, three hundred ninety-one thousand, four hundred five".