1312906865 has 8 divisors (see below), whose sum is σ = 1594470528. Its totient is φ = 1037670640.

The previous prime is 1312906841. The next prime is 1312906871. The reversal of 1312906865 is 5686092131.

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

It is not a de Polignac number, because 1312906865 - 2⁶ = 1312906801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581401 + ... + 1582230.

It is an arithmetic number, because the mean of its divisors is an integer number (199308816).

Almost surely, 2^1312906865 is an apocalyptic number.

It is an amenable number.

1312906865 is a deficient number, since it is larger than the sum of its proper divisors (281563663).

1312906865 is an equidigital number, since it uses as much as digits as its factorization.

1312906865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163719.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1312906865 is about 36234.0567008443. The cubic root of 1312906865 is about 1094.9929080808.

Adding to 1312906865 its reverse (5686092131), we get a palindrome (6998998996).

The spelling of 1312906865 in words is "one billion, three hundred twelve million, nine hundred six thousand, eight hundred sixty-five".