1305242545133 has 2 divisors, whose sum is σ = 1305242545134. Its totient is φ = 1305242545132.

The previous prime is 1305242545129. The next prime is 1305242545157. The reversal of 1305242545133 is 3315452425031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1064885716489 + 240356828644 = 1031933^2 + 490262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305242545133 - 2² = 1305242545129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305242545193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652621272566 + 652621272567.

It is an arithmetic number, because the mean of its divisors is an integer number (652621272567).

Almost surely, 2^{1305242545133} is an apocalyptic number.

It is an amenable number.

1305242545133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305242545133 is an equidigital number, since it uses as much as digits as its factorization.

1305242545133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 1305242545133 in words is "one trillion, three hundred five billion, two hundred forty-two million, five hundred forty-five thousand, one hundred thirty-three".