1242113317 has 2 divisors, whose sum is σ = 1242113318. Its totient is φ = 1242113316.

The previous prime is 1242113309. The next prime is 1242113339. The reversal of 1242113317 is 7133112421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1219825476 + 22287841 = 34926^2 + 4721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242113317 - 2³ = 1242113309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242113291 and 1242113300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242113357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621056658 + 621056659.

It is an arithmetic number, because the mean of its divisors is an integer number (621056659).

Almost surely, 2^1242113317 is an apocalyptic number.

It is an amenable number.

1242113317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242113317 is an equidigital number, since it uses as much as digits as its factorization.

1242113317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 1242113317 is about 35243.6280340149. The cubic root of 1242113317 is about 1074.9470511508.

Adding to 1242113317 its reverse (7133112421), we get a palindrome (8375225738).

The spelling of 1242113317 in words is "one billion, two hundred forty-two million, one hundred thirteen thousand, three hundred seventeen".