1101800 has 48 divisors (see below), whose sum is σ = 2931360. Its totient is φ = 377280.

The previous prime is 1101781. The next prime is 1101803. The reversal of 1101800 is 81011.

It is not an unprimeable number, because it can be changed into a prime (1101803) 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 11 ways as a sum of consecutive naturals, for example, 1007 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (61070).

2^1101800 is an apocalyptic number.

1101800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465680).

1101800 is an abundant number, since it is smaller than the sum of its proper divisors (1829560).

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

1101800 is a wasteful number, since it uses less digits than its factorization.

1101800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1101800 is about 1049.6666137398. Note that the first 4 decimals coincide. The cubic root of 1101800 is about 103.2842870492.

Adding to 1101800 its reverse (81011), we get a palindrome (1182811).

The spelling of 1101800 in words is "one million, one hundred one thousand, eight hundred".