1312543520 has 48 divisors (see below), whose sum is σ = 3135759480. Its totient is φ = 519112704.

The previous prime is 1312543517. The next prime is 1312543543. The reversal of 1312543520 is 253452131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 533240464 + 779303056 = 23092^2 + 27916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1312543520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31847 + ... + 60326.

Almost surely, 2^1312543520 is an apocalyptic number.

1312543520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312543520 is an abundant number, since it is smaller than the sum of its proper divisors (1823215960).

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

1312543520 is an equidigital number, since it uses as much as digits as its factorization.

1312543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92277 (or 92269 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1312543520 is about 36229.0424935576. The cubic root of 1312543520 is about 1094.8918862143.

Adding to 1312543520 its reverse (253452131), we get a palindrome (1565995651).

The spelling of 1312543520 in words is "one billion, three hundred twelve million, five hundred forty-three thousand, five hundred twenty".