1265065065 has 24 divisors (see below), whose sum is σ = 2392123968. Its totient is φ = 613364640.

The previous prime is 1265065027. The next prime is 1265065093. The reversal of 1265065065 is 5605605621.

It is a happy number.

It is not a de Polignac number, because 1265065065 - 2¹¹ = 1265063017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1277349 + ... + 1278338.

It is an arithmetic number, because the mean of its divisors is an integer number (99671832).

Almost surely, 2^1265065065 is an apocalyptic number.

1265065065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265065065 is a deficient number, since it is larger than the sum of its proper divisors (1127058903).

1265065065 is a wasteful number, since it uses less digits than its factorization.

1265065065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555709 (or 2555706 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1265065065 is about 35567.7531620990. The cubic root of 1265065065 is about 1081.5276349876.

The spelling of 1265065065 in words is "one billion, two hundred sixty-five million, sixty-five thousand, sixty-five".