1255542679 has 2 divisors, whose sum is σ = 1255542680. Its totient is φ = 1255542678.

The previous prime is 1255542647. The next prime is 1255542697. The reversal of 1255542679 is 9762455521.

Together with next prime (1255542697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255542679 - 2⁵ = 1255542647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255542619) 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, 627771339 + 627771340.

It is an arithmetic number, because the mean of its divisors is an integer number (627771340).

Almost surely, 2^1255542679 is an apocalyptic number.

1255542679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255542679 is an equidigital number, since it uses as much as digits as its factorization.

1255542679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 46.

The square root of 1255542679 is about 35433.6376766484. The cubic root of 1255542679 is about 1078.8071761351.

The spelling of 1255542679 in words is "one billion, two hundred fifty-five million, five hundred forty-two thousand, six hundred seventy-nine".