1312130643 has 4 divisors (see below), whose sum is σ = 1749507528. Its totient is φ = 874753760.

The previous prime is 1312130641. The next prime is 1312130647. The reversal of 1312130643 is 3460312131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3460312131 = 3 ⋅1153437377.

It is a cyclic number.

It is not a de Polignac number, because 1312130643 - 2¹ = 1312130641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312130641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218688438 + ... + 218688443.

It is an arithmetic number, because the mean of its divisors is an integer number (437376882).

Almost surely, 2^1312130643 is an apocalyptic number.

1312130643 is a deficient number, since it is larger than the sum of its proper divisors (437376885).

1312130643 is an equidigital number, since it uses as much as digits as its factorization.

1312130643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437376884.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1312130643 is about 36223.3438958912. The cubic root of 1312130643 is about 1094.7770701901. Note that the first 3 decimals are identical.

Adding to 1312130643 its reverse (3460312131), we get a palindrome (4772442774).

The spelling of 1312130643 in words is "one billion, three hundred twelve million, one hundred thirty thousand, six hundred forty-three".