1255257089 has 2 divisors, whose sum is σ = 1255257090. Its totient is φ = 1255257088.

The previous prime is 1255257071. The next prime is 1255257103. The reversal of 1255257089 is 9807525521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1212223489 + 43033600 = 34817^2 + 6560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255257089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1255257049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627628544 + 627628545.

It is an arithmetic number, because the mean of its divisors is an integer number (627628545).

Almost surely, 2^1255257089 is an apocalyptic number.

It is an amenable number.

1255257089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255257089 is an equidigital number, since it uses as much as digits as its factorization.

1255257089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 1255257089 is about 35429.6075197002. The cubic root of 1255257089 is about 1078.7253735516.

The spelling of 1255257089 in words is "one billion, two hundred fifty-five million, two hundred fifty-seven thousand, eighty-nine".