1271651960 has 32 divisors (see below), whose sum is σ = 2903927760. Its totient is φ = 501067776.

The previous prime is 1271651959. The next prime is 1271651987. The reversal of 1271651960 is 691561721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234569 + ... + 239928.

Almost surely, 2^1271651960 is an apocalyptic number.

1271651960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271651960 is an abundant number, since it is smaller than the sum of its proper divisors (1632275800).

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

1271651960 is a wasteful number, since it uses less digits than its factorization.

1271651960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474575 (or 474571 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1271651960 is about 35660.2293879330. The cubic root of 1271651960 is about 1083.4014728475.

The spelling of 1271651960 in words is "one billion, two hundred seventy-one million, six hundred fifty-one thousand, nine hundred sixty".