1312105530 has 32 divisors (see below), whose sum is σ = 3155400000. Its totient is φ = 349189632.

The previous prime is 1312105519. The next prime is 1312105607. The reversal of 1312105530 is 355012131.

It is a junction number, because it is equal to n+sod(n) for n = 1312105497 and 1312105506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28855 + ... + 58794.

It is an arithmetic number, because the mean of its divisors is an integer number (98606250).

Almost surely, 2^1312105530 is an apocalyptic number.

1312105530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312105530 is an abundant number, since it is smaller than the sum of its proper divisors (1843294470).

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

1312105530 is a wasteful number, since it uses less digits than its factorization.

1312105530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88158.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1312105530 is about 36222.9972531264. The cubic root of 1312105530 is about 1094.7700857962.

Adding to 1312105530 its reverse (355012131), we get a palindrome (1667117661).

The spelling of 1312105530 in words is "one billion, three hundred twelve million, one hundred five thousand, five hundred thirty".