1265040659 has 2 divisors, whose sum is σ = 1265040660. Its totient is φ = 1265040658.

The previous prime is 1265040629. The next prime is 1265040671. The reversal of 1265040659 is 9560405621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265040659 - 2¹⁶ = 1264975123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1265040629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632520329 + 632520330.

It is an arithmetic number, because the mean of its divisors is an integer number (632520330).

Almost surely, 2^1265040659 is an apocalyptic number.

1265040659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265040659 is an equidigital number, since it uses as much as digits as its factorization.

1265040659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1265040659 is about 35567.4100687694. The cubic root of 1265040659 is about 1081.5206798952.

The spelling of 1265040659 in words is "one billion, two hundred sixty-five million, forty thousand, six hundred fifty-nine".