1260840065 has 16 divisors (see below), whose sum is σ = 1530342720. Its totient is φ = 997147200.

The previous prime is 1260840011. The next prime is 1260840067. The reversal of 1260840065 is 5600480621.

It is a de Polignac number, because none of the positive numbers 2^k-1260840065 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1260840067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416126 + ... + 419144.

It is an arithmetic number, because the mean of its divisors is an integer number (95646420).

Almost surely, 2^1260840065 is an apocalyptic number.

It is an amenable number.

1260840065 is a deficient number, since it is larger than the sum of its proper divisors (269502655).

1260840065 is a wasteful number, since it uses less digits than its factorization.

1260840065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1260840065 is about 35508.3098020731. The cubic root of 1260840065 is about 1080.3222817907.

The spelling of 1260840065 in words is "one billion, two hundred sixty million, eight hundred forty thousand, sixty-five".