1811120 has 20 divisors (see below), whose sum is σ = 4211040. Its totient is φ = 724416.

The previous prime is 1811119. The next prime is 1811141. The reversal of 1811120 is 211181.

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1811095 and 1811104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11240 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (210552).

2^1811120 is an apocalyptic number.

1811120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1811120 is an abundant number, since it is smaller than the sum of its proper divisors (2399920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1811120 is a wasteful number, since it uses less digits than its factorization.

1811120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22652 (or 22646 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1811120 is about 1345.7785850577. The cubic root of 1811120 is about 121.8940224527.

The spelling of 1811120 in words is "one million, eight hundred eleven thousand, one hundred twenty".