1286665513 has 8 divisors (see below), whose sum is σ = 1472349632. Its totient is φ = 1101450096.

The previous prime is 1286665507. The next prime is 1286665537. The reversal of 1286665513 is 3155666821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1286665513 - 2⁵ = 1286665481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1286665513.

It is not an unprimeable number, because it can be changed into a prime (1286665543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111270 + ... + 122287.

It is an arithmetic number, because the mean of its divisors is an integer number (184043704).

Almost surely, 2^1286665513 is an apocalyptic number.

It is an amenable number.

1286665513 is a deficient number, since it is larger than the sum of its proper divisors (185684119).

1286665513 is an equidigital number, since it uses as much as digits as its factorization.

1286665513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234351.

The product of its digits is 259200, while the sum is 43.

The square root of 1286665513 is about 35870.1200583438. The cubic root of 1286665513 is about 1087.6484706439.

The spelling of 1286665513 in words is "one billion, two hundred eighty-six million, six hundred sixty-five thousand, five hundred thirteen".