1255217659 has 2 divisors, whose sum is σ = 1255217660. Its totient is φ = 1255217658.

The previous prime is 1255217647. The next prime is 1255217741. The reversal of 1255217659 is 9567125521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255217659 - 2⁷ = 1255217531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255217959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627608829 + 627608830.

It is an arithmetic number, because the mean of its divisors is an integer number (627608830).

Almost surely, 2^1255217659 is an apocalyptic number.

1255217659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255217659 is an equidigital number, since it uses as much as digits as its factorization.

1255217659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 43.

The square root of 1255217659 is about 35429.0510598294. The cubic root of 1255217659 is about 1078.7140784984.

The spelling of 1255217659 in words is "one billion, two hundred fifty-five million, two hundred seventeen thousand, six hundred fifty-nine".