1312304560 has 160 divisors (see below), whose sum is σ = 3669765120. Its totient is φ = 426691584.

The previous prime is 1312304503. The next prime is 1312304569. The reversal of 1312304560 is 654032131.

It is not an unprimeable number, because it can be changed into a prime (1312304569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1789954 + ... + 1790686.

It is an arithmetic number, because the mean of its divisors is an integer number (22936032).

Almost surely, 2^1312304560 is an apocalyptic number.

1312304560 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 1312304560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834882560).

1312304560 is an abundant number, since it is smaller than the sum of its proper divisors (2357460560).

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

1312304560 is a wasteful number, since it uses less digits than its factorization.

1312304560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1312304560 is about 36225.7444367952. The cubic root of 1312304560 is about 1094.8254373079.

Adding to 1312304560 its reverse (654032131), we get a palindrome (1966336691).

The spelling of 1312304560 in words is "one billion, three hundred twelve million, three hundred four thousand, five hundred sixty".