1312120513 has 8 divisors (see below), whose sum is σ = 1433849760. Its totient is φ = 1190798880.

The previous prime is 1312120501. The next prime is 1312120517. The reversal of 1312120513 is 3150212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312120513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312120517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95148 + ... + 108061.

It is an arithmetic number, because the mean of its divisors is an integer number (179231220).

Almost surely, 2^1312120513 is an apocalyptic number.

It is an amenable number.

1312120513 is a deficient number, since it is larger than the sum of its proper divisors (121729247).

1312120513 is a wasteful number, since it uses less digits than its factorization.

1312120513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203807.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1312120513 is about 36223.2040686629. The cubic root of 1312120513 is about 1094.7742528588.

Adding to 1312120513 its reverse (3150212131), we get a palindrome (4462332644).

The spelling of 1312120513 in words is "one billion, three hundred twelve million, one hundred twenty thousand, five hundred thirteen".