1255743563 has 2 divisors, whose sum is σ = 1255743564. Its totient is φ = 1255743562.

The previous prime is 1255743521. The next prime is 1255743569. The reversal of 1255743563 is 3653475521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255743563 - 2¹⁰ = 1255742539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255743563.

It is not a weakly prime, because it can be changed into another prime (1255743569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627871781 + 627871782.

It is an arithmetic number, because the mean of its divisors is an integer number (627871782).

Almost surely, 2^1255743563 is an apocalyptic number.

1255743563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255743563 is an equidigital number, since it uses as much as digits as its factorization.

1255743563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 41.

The square root of 1255743563 is about 35436.4722143726. The cubic root of 1255743563 is about 1078.8647086394.

The spelling of 1255743563 in words is "one billion, two hundred fifty-five million, seven hundred forty-three thousand, five hundred sixty-three".