1100045 has 4 divisors (see below), whose sum is σ = 1320060. Its totient is φ = 880032.

The previous prime is 1100041. The next prime is 1100051. The reversal of 1100045 is 5400011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 779689 = 566^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100045 - 2² = 1100041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1099999 and 1100035.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100041) 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, 110000 + ... + 110009.

It is an arithmetic number, because the mean of its divisors is an integer number (330015).

2^1100045 is an apocalyptic number.

It is an amenable number.

1100045 is a deficient number, since it is larger than the sum of its proper divisors (220015).

1100045 is an equidigital number, since it uses as much as digits as its factorization.

1100045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220014.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1100045 is about 1048.8303008590. The cubic root of 1100045 is about 103.2294191811.

Adding to 1100045 its reverse (5400011), we get a palindrome (6500056).

The spelling of 1100045 in words is "one million, one hundred thousand, forty-five".