1260871865 has 16 divisors (see below), whose sum is σ = 1651285440. Its totient is φ = 916614720.

The previous prime is 1260871849. The next prime is 1260871873. The reversal of 1260871865 is 5681780621.

It is a happy number.

It is not a de Polignac number, because 1260871865 - 2⁴ = 1260871849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260891 + ... + 265679.

It is an arithmetic number, because the mean of its divisors is an integer number (103205340).

Almost surely, 2^1260871865 is an apocalyptic number.

It is an amenable number.

1260871865 is a deficient number, since it is larger than the sum of its proper divisors (390413575).

1260871865 is a wasteful number, since it uses less digits than its factorization.

1260871865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1260871865 is about 35508.7575817572. The cubic root of 1260871865 is about 1080.3313640845.

The spelling of 1260871865 in words is "one billion, two hundred sixty million, eight hundred seventy-one thousand, eight hundred sixty-five".