1121271 has 4 divisors (see below), whose sum is σ = 1495032. Its totient is φ = 747512.

The previous prime is 1121261. The next prime is 1121293. The reversal of 1121271 is 1721211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1721211 = 3 ⋅573737.

It is a cyclic number.

It is not a de Polignac number, because 1121271 - 2⁷ = 1121143 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186876 + ... + 186881.

It is an arithmetic number, because the mean of its divisors is an integer number (373758).

2^1121271 is an apocalyptic number.

1121271 is a deficient number, since it is larger than the sum of its proper divisors (373761).

1121271 is an equidigital number, since it uses as much as digits as its factorization.

1121271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373760.

The product of its digits is 28, while the sum is 15.

The square root of 1121271 is about 1058.9008452164. The cubic root of 1121271 is about 103.8891508769.

Adding to 1121271 its reverse (1721211), we get a palindrome (2842482).

The spelling of 1121271 in words is "one million, one hundred twenty-one thousand, two hundred seventy-one".