1304536405 has 4 divisors (see below), whose sum is σ = 1565443692. Its totient is φ = 1043629120.

The previous prime is 1304536399. The next prime is 1304536421. The reversal of 1304536405 is 5046354031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 623900484 + 680635921 = 24978^2 + 26089^2 .

It is not a de Polignac number, because 1304536405 - 2¹³ = 1304528213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130453636 + ... + 130453645.

It is an arithmetic number, because the mean of its divisors is an integer number (391360923).

Almost surely, 2^1304536405 is an apocalyptic number.

It is an amenable number.

1304536405 is a deficient number, since it is larger than the sum of its proper divisors (260907287).

1304536405 is an equidigital number, since it uses as much as digits as its factorization.

1304536405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260907286.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 1304536405 is about 36118.3665882055. The cubic root of 1304536405 is about 1092.6608964873.

The spelling of 1304536405 in words is "one billion, three hundred four million, five hundred thirty-six thousand, four hundred five".