1243142203417 has 2 divisors, whose sum is σ = 1243142203418. Its totient is φ = 1243142203416.

The previous prime is 1243142203367. The next prime is 1243142203421. The reversal of 1243142203417 is 7143022413421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1212881513481 + 30260689936 = 1101309^2 + 173956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243142203417 - 2³⁵ = 1208782465049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243142203477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621571101708 + 621571101709.

It is an arithmetic number, because the mean of its divisors is an integer number (621571101709).

Almost surely, 2^{1243142203417} is an apocalyptic number.

It is an amenable number.

1243142203417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243142203417 is an equidigital number, since it uses as much as digits as its factorization.

1243142203417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 1243142203417 its reverse (7143022413421), we get a palindrome (8386164616838).

The spelling of 1243142203417 in words is "one trillion, two hundred forty-three billion, one hundred forty-two million, two hundred three thousand, four hundred seventeen".