1271143 has 4 divisors (see below), whose sum is σ = 1281280. Its totient is φ = 1261008.

The previous prime is 1271129. The next prime is 1271147. The reversal of 1271143 is 3411721.

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 1271143 - 2⁵ = 1271111 is a prime.

It is a Duffinian number.

1271143 is a modest number, since divided by 1143 gives 127 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1271143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271147) 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, 4878 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (320320).

2^1271143 is an apocalyptic number.

1271143 is a deficient number, since it is larger than the sum of its proper divisors (10137).

1271143 is a wasteful number, since it uses less digits than its factorization.

1271143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10136.

The product of its digits is 168, while the sum is 19.

The square root of 1271143 is about 1127.4497771520. The cubic root of 1271143 is about 108.3256915057.

Adding to 1271143 its reverse (3411721), we get a palindrome (4682864).

It can be divided in two parts, 127 and 1143, that multiplied together give a square (145161 = 381²).

The spelling of 1271143 in words is "one million, two hundred seventy-one thousand, one hundred forty-three".