1271381559 has 32 divisors (see below), whose sum is σ = 2000739840. Its totient is φ = 703043712.

The previous prime is 1271381519. The next prime is 1271381563. The reversal of 1271381559 is 9551831721.

It is not a de Polignac number, because 1271381559 - 2⁹ = 1271381047 is a prime.

It is a super-2 number, since 2×1271381559² = 3232822137130540962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1271381559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271381519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91969 + ... + 104885.

It is an arithmetic number, because the mean of its divisors is an integer number (62523120).

Almost surely, 2^1271381559 is an apocalyptic number.

1271381559 is a deficient number, since it is larger than the sum of its proper divisors (729358281).

1271381559 is a wasteful number, since it uses less digits than its factorization.

1271381559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13079.

The product of its digits is 75600, while the sum is 42.

The square root of 1271381559 is about 35656.4378338611. The cubic root of 1271381559 is about 1083.3246767803.

The spelling of 1271381559 in words is "one billion, two hundred seventy-one million, three hundred eighty-one thousand, five hundred fifty-nine".