1101001 has 8 divisors (see below), whose sum is σ = 1214208. Its totient is φ = 990000.

The previous prime is 1100977. The next prime is 1101071. The reversal of 1101001 is 1001011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1101001 - 2¹¹ = 1098953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (151776).

2^1101001 is an apocalyptic number.

1101001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1101001 is a deficient number, since it is larger than the sum of its proper divisors (113207).

1101001 is a wasteful number, since it uses less digits than its factorization.

1101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103.

The product of its (nonzero) digits is 1, while the sum is 4.

The square root of 1101001 is about 1049.2859476806. The cubic root of 1101001 is about 103.2593145491.

Adding to 1101001 its reverse (1001011), we get a palindrome (2102012).

Multiplying 1101001 by its reverse (1001011), we get a palindrome (1102114112011).

It can be divided in two parts, 110 and 1001, that added together give a palindrome (1111).

The spelling of 1101001 in words is "one million, one hundred one thousand, one".