1312242017 has 2 divisors, whose sum is σ = 1312242018. Its totient is φ = 1312242016.

The previous prime is 1312241989. The next prime is 1312242073. The reversal of 1312242017 is 7102422131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1244607841 + 67634176 = 35279^2 + 8224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312242017 - 2¹² = 1312237921 is a prime.

It is a super-2 number, since 2×1312242017² = 3443958222360456578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312241983 and 1312242001.

It is not a weakly prime, because it can be changed into another prime (1312242917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656121008 + 656121009.

It is an arithmetic number, because the mean of its divisors is an integer number (656121009).

Almost surely, 2^1312242017 is an apocalyptic number.

It is an amenable number.

1312242017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312242017 is an equidigital number, since it uses as much as digits as its factorization.

1312242017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1312242017 is about 36224.8811868307. The cubic root of 1312242017 is about 1094.8080443040.

Adding to 1312242017 its reverse (7102422131), we get a palindrome (8414664148).

The spelling of 1312242017 in words is "one billion, three hundred twelve million, two hundred forty-two thousand, seventeen".