1271381542505 has 16 divisors (see below), whose sum is σ = 1578301217280. Its totient is φ = 982011188928.

The previous prime is 1271381542489. The next prime is 1271381542517. The reversal of 1271381542505 is 5052451831721.

It is a cyclic number.

It is not a de Polignac number, because 1271381542505 - 2⁴ = 1271381542489 is a prime.

It is a super-2 number, since 2×1271381542505² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10919024 + ... + 11034846.

It is an arithmetic number, because the mean of its divisors is an integer number (98643826080).

Almost surely, 2^{1271381542505} is an apocalyptic number.

It is an amenable number.

1271381542505 is a deficient number, since it is larger than the sum of its proper divisors (306919674775).

1271381542505 is a wasteful number, since it uses less digits than its factorization.

1271381542505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191560.

The product of its (nonzero) digits is 336000, while the sum is 44.

The spelling of 1271381542505 in words is "one trillion, two hundred seventy-one billion, three hundred eighty-one million, five hundred forty-two thousand, five hundred five".