1261126754033 has 2 divisors, whose sum is σ = 1261126754034. Its totient is φ = 1261126754032.

The previous prime is 1261126753907. The next prime is 1261126754039. The reversal of 1261126754033 is 3304576211621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1226795481664 + 34331272369 = 1107608^2 + 185287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1261126754033 - 2¹² = 1261126749937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1261126754039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630563377016 + 630563377017.

It is an arithmetic number, because the mean of its divisors is an integer number (630563377017).

Almost surely, 2^{1261126754033} is an apocalyptic number.

It is an amenable number.

1261126754033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261126754033 is an equidigital number, since it uses as much as digits as its factorization.

1261126754033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 1261126754033 in words is "one trillion, two hundred sixty-one billion, one hundred twenty-six million, seven hundred fifty-four thousand, thirty-three".