1100081 has 4 divisors (see below), whose sum is σ = 1158000. Its totient is φ = 1042164.

The previous prime is 1100063. The next prime is 1100089. The reversal of 1100081 is 1800011.

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: 1800011 = 17 ⋅105883.

It is a cyclic number.

It is not a de Polignac number, because 1100081 - 2¹⁰ = 1099057 is a prime.

It is a super-2 number, since 2×1100081² = 2420356413122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100089) 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, 28931 + ... + 28968.

It is an arithmetic number, because the mean of its divisors is an integer number (289500).

2^1100081 is an apocalyptic number.

It is an amenable number.

1100081 is a deficient number, since it is larger than the sum of its proper divisors (57919).

1100081 is an equidigital number, since it uses as much as digits as its factorization.

1100081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57918.

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

The square root of 1100081 is about 1048.8474626942. The cubic root of 1100081 is about 103.2305452619.

Adding to 1100081 its reverse (1800011), we get a palindrome (2900092).

The spelling of 1100081 in words is "one million, one hundred thousand, eighty-one".