1255539689 has 2 divisors, whose sum is σ = 1255539690. Its totient is φ = 1255539688.

The previous prime is 1255539683. The next prime is 1255539697. The reversal of 1255539689 is 9869355521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1056250000 + 199289689 = 32500^2 + 14117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255539689 - 2⁴ = 1255539673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255539689.

It is not a weakly prime, because it can be changed into another prime (1255539683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627769844 + 627769845.

It is an arithmetic number, because the mean of its divisors is an integer number (627769845).

Almost surely, 2^1255539689 is an apocalyptic number.

It is an amenable number.

1255539689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255539689 is an equidigital number, since it uses as much as digits as its factorization.

1255539689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916000, while the sum is 53.

The square root of 1255539689 is about 35433.5954850760. The cubic root of 1255539689 is about 1078.8063197628.

The spelling of 1255539689 in words is "one billion, two hundred fifty-five million, five hundred thirty-nine thousand, six hundred eighty-nine".