1271980140 has 48 divisors (see below), whose sum is σ = 3579475200. Its totient is φ = 337487040.

The previous prime is 1271980139. The next prime is 1271980153. The reversal of 1271980140 is 410891721.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41326 + ... + 65205.

It is an arithmetic number, because the mean of its divisors is an integer number (74572400).

Almost surely, 2^1271980140 is an apocalyptic number.

1271980140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271980140 is an abundant number, since it is smaller than the sum of its proper divisors (2307495060).

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

1271980140 is a wasteful number, since it uses less digits than its factorization.

1271980140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106742 (or 106740 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1271980140 is about 35664.8305757927. The cubic root of 1271980140 is about 1083.4946639944.

The spelling of 1271980140 in words is "one billion, two hundred seventy-one million, nine hundred eighty thousand, one hundred forty".