1243064426267 has 2 divisors, whose sum is σ = 1243064426268. Its totient is φ = 1243064426266.

The previous prime is 1243064426239. The next prime is 1243064426293. The reversal of 1243064426267 is 7626244603421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243064426267 - 2¹⁶ = 1243064360731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243064426237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621532213133 + 621532213134.

It is an arithmetic number, because the mean of its divisors is an integer number (621532213134).

Almost surely, 2^{1243064426267} is an apocalyptic number.

1243064426267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243064426267 is an equidigital number, since it uses as much as digits as its factorization.

1243064426267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 47.

The spelling of 1243064426267 in words is "one trillion, two hundred forty-three billion, sixty-four million, four hundred twenty-six thousand, two hundred sixty-seven".