1312210717 has 4 divisors (see below), whose sum is σ = 1313220636. Its totient is φ = 1311200800.

The previous prime is 1312210703. The next prime is 1312210751. The reversal of 1312210717 is 7170122131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394181316 + 918029401 = 19854^2 + 30299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312210717 - 2¹⁵ = 1312177949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312210691 and 1312210700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312210817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503008 + ... + 505609.

It is an arithmetic number, because the mean of its divisors is an integer number (328305159).

Almost surely, 2^1312210717 is an apocalyptic number.

It is an amenable number.

1312210717 is a deficient number, since it is larger than the sum of its proper divisors (1009919).

1312210717 is a wasteful number, since it uses less digits than its factorization.

1312210717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009918.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 1312210717 is about 36224.4491607533. The cubic root of 1312210717 is about 1094.7993396688.

Adding to 1312210717 its reverse (7170122131), we get a palindrome (8482332848).

The spelling of 1312210717 in words is "one billion, three hundred twelve million, two hundred ten thousand, seven hundred seventeen".