1260972689 has 2 divisors, whose sum is σ = 1260972690. Its totient is φ = 1260972688.

The previous prime is 1260972683. The next prime is 1260972701. The reversal of 1260972689 is 9862790621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 937584400 + 323388289 = 30620^2 + 17983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1260972689 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 (1260972683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630486344 + 630486345.

It is an arithmetic number, because the mean of its divisors is an integer number (630486345).

Almost surely, 2^1260972689 is an apocalyptic number.

It is an amenable number.

1260972689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260972689 is an equidigital number, since it uses as much as digits as its factorization.

1260972689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 1260972689 is about 35510.1772594844. The cubic root of 1260972689 is about 1080.3601590872.

The spelling of 1260972689 in words is "one billion, two hundred sixty million, nine hundred seventy-two thousand, six hundred eighty-nine".