1304405105 has 4 divisors (see below), whose sum is σ = 1565286132. Its totient is φ = 1043524080.

The previous prime is 1304405077. The next prime is 1304405107. The reversal of 1304405105 is 5015044031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5015044031 = 761 ⋅6590071.

It can be written as a sum of positive squares in 2 ways, for example, as 198443569 + 1105961536 = 14087^2 + 33256^2 .

It is not a de Polignac number, because 1304405105 - 2²² = 1300210801 is a prime.

It is a super-2 number, since 2×1304405105² = 3402945355900122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304405107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130440506 + ... + 130440515.

It is an arithmetic number, because the mean of its divisors is an integer number (391321533).

Almost surely, 2^1304405105 is an apocalyptic number.

It is an amenable number.

1304405105 is a deficient number, since it is larger than the sum of its proper divisors (260881027).

1304405105 is an equidigital number, since it uses as much as digits as its factorization.

1304405105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260881026.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1304405105 is about 36116.5489076684. The cubic root of 1304405105 is about 1092.6242369279.

Adding to 1304405105 its reverse (5015044031), we get a palindrome (6319449136).

The spelling of 1304405105 in words is "one billion, three hundred four million, four hundred five thousand, one hundred five".