1304520445 has 4 divisors (see below), whose sum is σ = 1565424540. Its totient is φ = 1043616352.

The previous prime is 1304520431. The next prime is 1304520457. The reversal of 1304520445 is 5440254031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5440254031 = 17 ⋅320014943.

It can be written as a sum of positive squares in 2 ways, for example, as 928664676 + 375855769 = 30474^2 + 19387^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304520445 - 2⁹ = 1304519933 is a prime.

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, 130452040 + ... + 130452049.

It is an arithmetic number, because the mean of its divisors is an integer number (391356135).

Almost surely, 2^1304520445 is an apocalyptic number.

It is an amenable number.

1304520445 is a deficient number, since it is larger than the sum of its proper divisors (260904095).

1304520445 is an equidigital number, since it uses as much as digits as its factorization.

1304520445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260904094.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1304520445 is about 36118.1456473059. The cubic root of 1304520445 is about 1092.6564405138.

Adding to 1304520445 its reverse (5440254031), we get a palindrome (6744774476).

The spelling of 1304520445 in words is "one billion, three hundred four million, five hundred twenty thousand, four hundred forty-five".