1271920896 has 81 divisors (see below), whose sum is σ = 3672203899. Its totient is φ = 423403008.

The previous prime is 1271920883. The next prime is 1271920919. The reversal of 1271920896 is 6980291721.

The square root of 1271920896 is 35664.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1711501 + ... + 1712243.

Almost surely, 2^1271920896 is an apocalyptic number.

1271920896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1271920896 is the 35664-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271920896

1271920896 is an abundant number, since it is smaller than the sum of its proper divisors (2400283003).

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

1271920896 is an frugal number, since it uses more digits than its factorization.

1271920896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The cubic root of 1271920896 is about 1083.4778420456.

The spelling of 1271920896 in words is "one billion, two hundred seventy-one million, nine hundred twenty thousand, eight hundred ninety-six".