1304500520 has 16 divisors (see below), whose sum is σ = 2935126260. Its totient is φ = 521800192.

The previous prime is 1304500493. The next prime is 1304500543. The reversal of 1304500520 is 250054031.

It can be written as a sum of positive squares in 2 ways, for example, as 1286369956 + 18130564 = 35866^2 + 4258^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1304500492 and 1304500501.

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, 16306217 + ... + 16306296.

Almost surely, 2^1304500520 is an apocalyptic number.

1304500520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304500520 is an abundant number, since it is smaller than the sum of its proper divisors (1630625740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1304500520 is a wasteful number, since it uses less digits than its factorization.

1304500520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32612524 (or 32612520 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1304500520 is about 36117.8698153698. The cubic root of 1304500520 is about 1092.6508774758.

Adding to 1304500520 its reverse (250054031), we get a palindrome (1554554551).

The spelling of 1304500520 in words is "one billion, three hundred four million, five hundred thousand, five hundred twenty".