1271023880 has 32 divisors (see below), whose sum is σ = 3268347840. Its totient is φ = 435779520.

The previous prime is 1271023879. The next prime is 1271023891. The reversal of 1271023880 is 883201721.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2269406 + ... + 2269965.

It is an arithmetic number, because the mean of its divisors is an integer number (102135870).

Almost surely, 2^1271023880 is an apocalyptic number.

1271023880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271023880 is an abundant number, since it is smaller than the sum of its proper divisors (1997323960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271023880 is a wasteful number, since it uses less digits than its factorization.

1271023880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539389 (or 4539385 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1271023880 is about 35651.4218510286. The cubic root of 1271023880 is about 1083.2230763266.

The spelling of 1271023880 in words is "one billion, two hundred seventy-one million, twenty-three thousand, eight hundred eighty".