1271222871 has 16 divisors (see below), whose sum is σ = 1714078464. Its totient is φ = 837978624.

The previous prime is 1271222851. The next prime is 1271222881. The reversal of 1271222871 is 1782221721.

It is not a de Polignac number, because 1271222871 - 2⁵ = 1271222839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271222831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90120 + ... + 103266.

It is an arithmetic number, because the mean of its divisors is an integer number (107129904).

Almost surely, 2^1271222871 is an apocalyptic number.

1271222871 is a deficient number, since it is larger than the sum of its proper divisors (442855593).

1271222871 is a wasteful number, since it uses less digits than its factorization.

1271222871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13510.

The product of its digits is 6272, while the sum is 33.

The square root of 1271222871 is about 35654.2125281151. The cubic root of 1271222871 is about 1083.2796030367.

The spelling of 1271222871 in words is "one billion, two hundred seventy-one million, two hundred twenty-two thousand, eight hundred seventy-one".