1115887 has 4 divisors (see below), whose sum is σ = 1118376. Its totient is φ = 1113400.

The previous prime is 1115879. The next prime is 1115899. The reversal of 1115887 is 7885111.

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 1115887 - 2³ = 1115879 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115857) 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, 364 + ... + 1537.

It is an arithmetic number, because the mean of its divisors is an integer number (279594).

2^1115887 is an apocalyptic number.

1115887 is a deficient number, since it is larger than the sum of its proper divisors (2489).

1115887 is an equidigital number, since it uses as much as digits as its factorization.

1115887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488.

The product of its digits is 2240, while the sum is 31.

The square root of 1115887 is about 1056.3555272729. The cubic root of 1115887 is about 103.7226027237.

It can be divided in two parts, 1115 and 887, that added together give a palindrome (2002).

The spelling of 1115887 in words is "one million, one hundred fifteen thousand, eight hundred eighty-seven".