1271941128 has 48 divisors (see below), whose sum is σ = 3456655020. Its totient is φ = 422526336.

The previous prime is 1271941109. The next prime is 1271941169. The reversal of 1271941128 is 8211491721.

It can be written as a sum of positive squares in 2 ways, for example, as 1226540484 + 45400644 = 35022^2 + 6738^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1271941092 and 1271941101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9051 + ... + 51242.

Almost surely, 2^1271941128 is an apocalyptic number.

1271941128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1271941128 is an abundant number, since it is smaller than the sum of its proper divisors (2184713892).

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

1271941128 is a wasteful number, since it uses less digits than its factorization.

1271941128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60598 (or 60591 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1271941128 is about 35664.2836462475. The cubic root of 1271941128 is about 1083.4835868492.

The spelling of 1271941128 in words is "one billion, two hundred seventy-one million, nine hundred forty-one thousand, one hundred twenty-eight".