1271161423 has 4 divisors (see below), whose sum is σ = 1452755920. Its totient is φ = 1089566928.

The previous prime is 1271161421. The next prime is 1271161439. The reversal of 1271161423 is 3241611721.

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 1271161423 - 2¹ = 1271161421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1271161391 and 1271161400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271161421) 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, 90797238 + ... + 90797251.

It is an arithmetic number, because the mean of its divisors is an integer number (363188980).

Almost surely, 2^1271161423 is an apocalyptic number.

1271161423 is a deficient number, since it is larger than the sum of its proper divisors (181594497).

1271161423 is an equidigital number, since it uses as much as digits as its factorization.

1271161423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181594496.

The product of its digits is 2016, while the sum is 28.

The square root of 1271161423 is about 35653.3507962435. The cubic root of 1271161423 is about 1083.2621483377.

The spelling of 1271161423 in words is "one billion, two hundred seventy-one million, one hundred sixty-one thousand, four hundred twenty-three".