1271116555 has 8 divisors (see below), whose sum is σ = 1525575744. Its totient is φ = 1016736000.

The previous prime is 1271116541. The next prime is 1271116573. The reversal of 1271116555 is 5556111721.

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

It is not a de Polignac number, because 1271116555 - 2²⁹ = 734245643 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 1271116555.

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, 25230 + ... + 56380.

It is an arithmetic number, because the mean of its divisors is an integer number (190696968).

Almost surely, 2^1271116555 is an apocalyptic number.

1271116555 is a deficient number, since it is larger than the sum of its proper divisors (254459189).

1271116555 is an equidigital number, since it uses as much as digits as its factorization.

1271116555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39317.

The product of its digits is 10500, while the sum is 34.

The square root of 1271116555 is about 35652.7215651204. The cubic root of 1271116555 is about 1083.2494029389.

The spelling of 1271116555 in words is "one billion, two hundred seventy-one million, one hundred sixteen thousand, five hundred fifty-five".