1271315712427 has 4 divisors (see below), whose sum is σ = 1282979159440. Its totient is φ = 1259652265416.

The previous prime is 1271315712413. The next prime is 1271315712437. The reversal of 1271315712427 is 7242175131721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1271315712427 - 2²⁷ = 1271181494699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271315712437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5831723343 + ... + 5831723560.

It is an arithmetic number, because the mean of its divisors is an integer number (320744789860).

Almost surely, 2^{1271315712427} is an apocalyptic number.

1271315712427 is a deficient number, since it is larger than the sum of its proper divisors (11663447013).

1271315712427 is a wasteful number, since it uses less digits than its factorization.

1271315712427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11663447012.

The product of its digits is 164640, while the sum is 43.

The spelling of 1271315712427 in words is "one trillion, two hundred seventy-one billion, three hundred fifteen million, seven hundred twelve thousand, four hundred twenty-seven".