1271157129 has 12 divisors (see below), whose sum is σ = 2003035632. Its totient is φ = 770398200.

The previous prime is 1271157127. The next prime is 1271157137. The reversal of 1271157129 is 9217511721.

1271157129 is a `hidden beast` number, since 12 + 71 + 1 + 571 + 2 + 9 = 666.

It is not a de Polignac number, because 1271157129 - 2¹ = 1271157127 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1271157093 and 1271157102.

It is not an unprimeable number, because it can be changed into a prime (1271157127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6419887 + ... + 6420084.

It is an arithmetic number, because the mean of its divisors is an integer number (166919636).

Almost surely, 2^1271157129 is an apocalyptic number.

It is an amenable number.

1271157129 is a deficient number, since it is larger than the sum of its proper divisors (731878503).

1271157129 is a wasteful number, since it uses less digits than its factorization.

1271157129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12839988 (or 12839985 counting only the distinct ones).

The product of its digits is 8820, while the sum is 36.

The square root of 1271157129 is about 35653.2905774488. The cubic root of 1271157129 is about 1083.2609285784.

The spelling of 1271157129 in words is "one billion, two hundred seventy-one million, one hundred fifty-seven thousand, one hundred twenty-nine".