1312747085 has 8 divisors (see below), whose sum is σ = 1696473240. Its totient is φ = 969413184.

The previous prime is 1312746971. The next prime is 1312747091. The reversal of 1312747085 is 5807472131.

It can be written as a sum of positive squares in 4 ways, for example, as 79192201 + 1233554884 = 8899^2 + 35122^2 .

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 1312747085 - 2⁸ = 1312746829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10097990 + ... + 10098119.

It is an arithmetic number, because the mean of its divisors is an integer number (212059155).

Almost surely, 2^1312747085 is an apocalyptic number.

It is an amenable number.

1312747085 is a deficient number, since it is larger than the sum of its proper divisors (383726155).

1312747085 is a wasteful number, since it uses less digits than its factorization.

1312747085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196127.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 1312747085 is about 36231.8518019711. The cubic root of 1312747085 is about 1094.9484862792.

The spelling of 1312747085 in words is "one billion, three hundred twelve million, seven hundred forty-seven thousand, eighty-five".