1101000 has 64 divisors (see below), whose sum is σ = 3444480. Its totient is φ = 292800.

The previous prime is 1100977. The next prime is 1101071. The reversal of 1101000 is 1011.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2817 + ... + 3183.

It is an arithmetic number, because the mean of its divisors is an integer number (53820).

2^1101000 is an apocalyptic number.

1101000 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 1101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722240).

1101000 is an abundant number, since it is smaller than the sum of its proper divisors (2343480).

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

1101000 is a wasteful number, since it uses less digits than its factorization.

1101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 3.

The square root of 1101000 is about 1049.2854711660. The cubic root of 1101000 is about 103.2592832869.

Adding to 1101000 its reverse (1011), we get a palindrome (1102011).

The spelling of 1101000 in words is "one million, one hundred one thousand".