1100042665 has 4 divisors (see below), whose sum is σ = 1320051204. Its totient is φ = 880034128.

The previous prime is 1100042663. The next prime is 1100042731. The reversal of 1100042665 is 5662400011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5662400011 = 67 ⋅84513433.

It can be written as a sum of positive squares in 2 ways, for example, as 270372249 + 829670416 = 16443^2 + 28804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100042665 - 2¹ = 1100042663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100042663) 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, 110004262 + ... + 110004271.

It is an arithmetic number, because the mean of its divisors is an integer number (330012801).

Almost surely, 2^1100042665 is an apocalyptic number.

It is an amenable number.

1100042665 is a deficient number, since it is larger than the sum of its proper divisors (220008539).

1100042665 is an equidigital number, since it uses as much as digits as its factorization.

1100042665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220008538.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1100042665 is about 33166.8910963931. The cubic root of 1100042665 is about 1032.2934614145.

Adding to 1100042665 its reverse (5662400011), we get a palindrome (6762442676).

The spelling of 1100042665 in words is "one billion, one hundred million, forty-two thousand, six hundred sixty-five".