1312313241 has 4 divisors (see below), whose sum is σ = 1749750992. Its totient is φ = 874875492.

The previous prime is 1312313237. The next prime is 1312313243. The reversal of 1312313241 is 1423132131.

1312313241 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1423132131 = 3 ⋅474377377.

It is not a de Polignac number, because 1312313241 - 2² = 1312313237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312313243) 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, 218718871 + ... + 218718876.

It is an arithmetic number, because the mean of its divisors is an integer number (437437748).

Almost surely, 2^1312313241 is an apocalyptic number.

It is an amenable number.

1312313241 is a deficient number, since it is larger than the sum of its proper divisors (437437751).

1312313241 is an equidigital number, since it uses as much as digits as its factorization.

1312313241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437437750.

The product of its digits is 432, while the sum is 21.

The square root of 1312313241 is about 36225.8642547007. The cubic root of 1312313241 is about 1094.8278514220.

Adding to 1312313241 its reverse (1423132131), we get a palindrome (2735445372).

The spelling of 1312313241 in words is "one billion, three hundred twelve million, three hundred thirteen thousand, two hundred forty-one".