1118881 has 4 divisors (see below), whose sum is σ = 1167552.
Its totient is φ = 1070212.
The previous prime is 1118869. The next prime is 1118893. The reversal of 1118881 is 1888111.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1888111 = 269 ⋅7019.
It is an interprime number because it is at equal distance from previous prime (1118869) and next prime (1118893).
It is a cyclic number.
It is not a de Polignac number, because 1118881 - 217 = 987809 is a prime.
It is a super-2 number, since 2×11188812 = 2503789384322, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1118851) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24301 + ... + 24346.
It is an arithmetic number, because the mean of its divisors is an integer number (291888).
21118881 is an apocalyptic number.
It is an amenable number.
1118881 is a deficient number, since it is larger than the sum of its proper divisors (48671).
1118881 is an equidigital number, since it uses as much as digits as its factorization.
1118881 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 48670.
The product of its digits is 512, while the sum is 28.
The square root of 1118881 is about 1057.7717145018.
The cubic root of 1118881 is about 103.8152847927.
The spelling of 1118881 in words is "one million, one hundred eighteen thousand, eight hundred eighty-one".