1271943785135 has 16 divisors (see below), whose sum is σ = 1616338050912. Its totient is φ = 957567744000.

The previous prime is 1271943785093. The next prime is 1271943785137. The reversal of 1271943785135 is 5315873491721.

It is not a de Polignac number, because 1271943785135 - 2²⁶ = 1271876676271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271943785137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397466 + ... + 1643735.

It is an arithmetic number, because the mean of its divisors is an integer number (101021128182).

Almost surely, 2^{1271943785135} is an apocalyptic number.

1271943785135 is a deficient number, since it is larger than the sum of its proper divisors (344394265777).

1271943785135 is a wasteful number, since it uses less digits than its factorization.

1271943785135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048554.

The product of its digits is 6350400, while the sum is 56.

The spelling of 1271943785135 in words is "one trillion, two hundred seventy-one billion, nine hundred forty-three million, seven hundred eighty-five thousand, one hundred thirty-five".