1113881 has 4 divisors (see below), whose sum is σ = 1117200. Its totient is φ = 1110564.

The previous prime is 1113877. The next prime is 1113883. The reversal of 1113881 is 1883111.

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: 1883111 = 293 ⋅6427.

It is a cyclic number.

It is not a de Polignac number, because 1113881 - 2² = 1113877 is a prime.

It is a super-2 number, since 2×1113881² = 2481461764322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1113883) 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, 1091 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (279300).

2^1113881 is an apocalyptic number.

It is an amenable number.

1113881 is a deficient number, since it is larger than the sum of its proper divisors (3319).

1113881 is an equidigital number, since it uses as much as digits as its factorization.

1113881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318.

The product of its digits is 192, while the sum is 23.

The square root of 1113881 is about 1055.4056092328. The cubic root of 1113881 is about 103.6604123332.

Adding to 1113881 its reverse (1883111), we get a palindrome (2996992).

The spelling of 1113881 in words is "one million, one hundred thirteen thousand, eight hundred eighty-one".