1265040611 has 2 divisors, whose sum is σ = 1265040612. Its totient is φ = 1265040610.

The previous prime is 1265040551. The next prime is 1265040613. The reversal of 1265040611 is 1160405621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265040611 - 2¹⁸ = 1264778467 is a prime.

It is a Sophie Germain prime.

Together with 1265040613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1265040613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632520305 + 632520306.

It is an arithmetic number, because the mean of its divisors is an integer number (632520306).

Almost surely, 2^1265040611 is an apocalyptic number.

1265040611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265040611 is an equidigital number, since it uses as much as digits as its factorization.

1265040611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1265040611 is about 35567.4093939944. The cubic root of 1265040611 is about 1081.5206662163.

The spelling of 1265040611 in words is "one billion, two hundred sixty-five million, forty thousand, six hundred eleven".