1000871271 has 12 divisors (see below), whose sum is σ = 1449001840. Its totient is φ = 665724960.

The previous prime is 1000871257. The next prime is 1000871279. The reversal of 1000871271 is 1721780001.

It is a de Polignac number, because none of the positive numbers 2^k-1000871271 is a prime.

It is a super-2 number, since 2×1000871271² = 2003486602226310882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000871279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122710 + ... + 130611.

Almost surely, 2^1000871271 is an apocalyptic number.

1000871271 is a deficient number, since it is larger than the sum of its proper divisors (448130569).

1000871271 is a wasteful number, since it uses less digits than its factorization.

1000871271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253766 (or 253763 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 1000871271 is about 31636.5496064283. The cubic root of 1000871271 is about 1000.2903393616.

The spelling of 1000871271 in words is "one billion, eight hundred seventy-one thousand, two hundred seventy-one".