1271087872 has 18 divisors (see below), whose sum is σ = 2537211068. Its totient is φ = 635543808.

The previous prime is 1271087849. The next prime is 1271087879. The reversal of 1271087872 is 2787801721.

It is not an unprimeable number, because it can be changed into a prime (1271087879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2482338 + ... + 2482849.

Almost surely, 2^1271087872 is an apocalyptic number.

It is an amenable number.

1271087872 is a deficient number, since it is larger than the sum of its proper divisors (1266123196).

1271087872 is an frugal number, since it uses more digits than its factorization.

1271087872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965203 (or 4965189 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 43.

The square root of 1271087872 is about 35652.3193074448. The cubic root of 1271087872 is about 1083.2412549643.

The spelling of 1271087872 in words is "one billion, two hundred seventy-one million, eighty-seven thousand, eight hundred seventy-two".