1265000771 has 2 divisors, whose sum is σ = 1265000772. Its totient is φ = 1265000770.

The previous prime is 1265000749. The next prime is 1265000773. The reversal of 1265000771 is 1770005621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265000771 - 2⁶ = 1265000707 is a prime.

Together with 1265000773, 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 (1265000773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632500385 + 632500386.

It is an arithmetic number, because the mean of its divisors is an integer number (632500386).

Almost surely, 2^1265000771 is an apocalyptic number.

1265000771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265000771 is an equidigital number, since it uses as much as digits as its factorization.

1265000771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 1265000771 is about 35566.8493263038. The cubic root of 1265000771 is about 1081.5093126320.

The spelling of 1265000771 in words is "one billion, two hundred sixty-five million, seven hundred seventy-one", and thus it is an aban number.