1271947160 has 96 divisors (see below), whose sum is σ = 3175880400. Its totient is φ = 458092800.

The previous prime is 1271947147. The next prime is 1271947169. The reversal of 1271947160 is 617491721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271947169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 526355 + ... + 528765.

Almost surely, 2^1271947160 is an apocalyptic number.

1271947160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271947160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1587940200).

1271947160 is an abundant number, since it is smaller than the sum of its proper divisors (1903933240).

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

1271947160 is a wasteful number, since it uses less digits than its factorization.

1271947160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 1271947160 is about 35664.3682125451. The cubic root of 1271947160 is about 1083.4852996021.

The spelling of 1271947160 in words is "one billion, two hundred seventy-one million, nine hundred forty-seven thousand, one hundred sixty".