1260256289 has 2 divisors, whose sum is σ = 1260256290. Its totient is φ = 1260256288.

The previous prime is 1260256267. The next prime is 1260256337. The reversal of 1260256289 is 9826520621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210483264 + 49773025 = 34792^2 + 7055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260256289 - 2⁸ = 1260256033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1260256489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630128144 + 630128145.

It is an arithmetic number, because the mean of its divisors is an integer number (630128145).

Almost surely, 2^1260256289 is an apocalyptic number.

It is an amenable number.

1260256289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260256289 is an equidigital number, since it uses as much as digits as its factorization.

1260256289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1260256289 is about 35500.0885773543. The cubic root of 1260256289 is about 1080.1555242992.

The spelling of 1260256289 in words is "one billion, two hundred sixty million, two hundred fifty-six thousand, two hundred eighty-nine".