1111881 has 8 divisors (see below), whose sum is σ = 1487584. Its totient is φ = 738720.

The previous prime is 1111867. The next prime is 1111897. The reversal of 1111881 is 1881111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1111881 is a prime.

It is a super-2 number, since 2×1111881² = 2472558716322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111801) 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 7 ways as a sum of consecutive naturals, for example, 966 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (185948).

2^1111881 is an apocalyptic number.

It is an amenable number.

1111881 is a deficient number, since it is larger than the sum of its proper divisors (375703).

1111881 is an equidigital number, since it uses as much as digits as its factorization.

1111881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271.

The product of its digits is 64, while the sum is 21.

The square root of 1111881 is about 1054.4576805164. The cubic root of 1111881 is about 103.5983335798.

Adding to 1111881 its reverse (1881111), we get a palindrome (2992992).

The spelling of 1111881 in words is "one million, one hundred eleven thousand, eight hundred eighty-one".