1271178280 has 32 divisors (see below), whose sum is σ = 3010687200. Its totient is φ = 481709376.

The previous prime is 1271178269. The next prime is 1271178319. The reversal of 1271178280 is 828711721.

It is a super-4 number, since 4×1271178280⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835542 + ... + 837061.

It is an arithmetic number, because the mean of its divisors is an integer number (94083975).

Almost surely, 2^1271178280 is an apocalyptic number.

1271178280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271178280 is an abundant number, since it is smaller than the sum of its proper divisors (1739508920).

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

1271178280 is a wasteful number, since it uses less digits than its factorization.

1271178280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672633 (or 1672629 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 37.

The square root of 1271178280 is about 35653.5871968025. The cubic root of 1271178280 is about 1083.2669367328.

The spelling of 1271178280 in words is "one billion, two hundred seventy-one million, one hundred seventy-eight thousand, two hundred eighty".