1111871 has 4 divisors (see below), whose sum is σ = 1118472. Its totient is φ = 1105272.

The previous prime is 1111867. The next prime is 1111897. The reversal of 1111871 is 1781111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1781111 = 331 ⋅5381.

It is a cyclic number.

It is not a de Polignac number, because 1111871 - 2² = 1111867 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 (1111801) 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, 3041 + ... + 3386.

It is an arithmetic number, because the mean of its divisors is an integer number (279618).

2^1111871 is an apocalyptic number.

1111871 is a deficient number, since it is larger than the sum of its proper divisors (6601).

1111871 is an equidigital number, since it uses as much as digits as its factorization.

1111871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600.

The product of its digits is 56, while the sum is 20.

The square root of 1111871 is about 1054.4529387317. The cubic root of 1111871 is about 103.5980229991.

Adding to 1111871 its reverse (1781111), we get a palindrome (2892982).

The spelling of 1111871 in words is "one million, one hundred eleven thousand, eight hundred seventy-one".