1271206317 has 8 divisors (see below), whose sum is σ = 1701695520. Its totient is φ = 844094000.

The previous prime is 1271206253. The next prime is 1271206319. The reversal of 1271206317 is 7136021721.

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 1271206317 - 2⁶ = 1271206253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271206319) 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, 843342 + ... + 844847.

It is an arithmetic number, because the mean of its divisors is an integer number (212711940).

Almost surely, 2^1271206317 is an apocalyptic number.

It is an amenable number.

1271206317 is a deficient number, since it is larger than the sum of its proper divisors (430489203).

1271206317 is a wasteful number, since it uses less digits than its factorization.

1271206317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688443.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 1271206317 is about 35653.9803808775. The cubic root of 1271206317 is about 1083.2749008220.

The spelling of 1271206317 in words is "one billion, two hundred seventy-one million, two hundred six thousand, three hundred seventeen".