1115871 has 4 divisors (see below), whose sum is σ = 1487832. Its totient is φ = 743912.

The previous prime is 1115857. The next prime is 1115879. The reversal of 1115871 is 1785111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1785111 = 3 ⋅595037.

It is a cyclic number.

It is not a de Polignac number, because 1115871 - 2⁵ = 1115839 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185976 + ... + 185981.

It is an arithmetic number, because the mean of its divisors is an integer number (371958).

2^1115871 is an apocalyptic number.

1115871 is a deficient number, since it is larger than the sum of its proper divisors (371961).

1115871 is an equidigital number, since it uses as much as digits as its factorization.

1115871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371960.

The product of its digits is 280, while the sum is 24.

The square root of 1115871 is about 1056.3479540379. The cubic root of 1115871 is about 103.7221069837.

The spelling of 1115871 in words is "one million, one hundred fifteen thousand, eight hundred seventy-one".