1304132520 has 128 divisors (see below), whose sum is σ = 3994583040. Its totient is φ = 340542720.

The previous prime is 1304132513. The next prime is 1304132561. The reversal of 1304132520 is 252314031.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1264405 + ... + 1265435.

It is an arithmetic number, because the mean of its divisors is an integer number (31207680).

Almost surely, 2^1304132520 is an apocalyptic number.

1304132520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1304132520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997291520).

1304132520 is an abundant number, since it is smaller than the sum of its proper divisors (2690450520).

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

1304132520 is a wasteful number, since it uses less digits than its factorization.

1304132520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1304132520 is about 36112.7750249133. The cubic root of 1304132520 is about 1092.5481220959.

Adding to 1304132520 its reverse (252314031), we get a palindrome (1556446551).

The spelling of 1304132520 in words is "one billion, three hundred four million, one hundred thirty-two thousand, five hundred twenty".