1097665 has 4 divisors (see below), whose sum is σ = 1317204. Its totient is φ = 878128.

The previous prime is 1097659. The next prime is 1097669. The reversal of 1097665 is 5667901.

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 802816 + 294849 = 896^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097665 - 2⁵ = 1097633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1097665.

It is not an unprimeable number, because it can be changed into a prime (1097669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109762 + ... + 109771.

It is an arithmetic number, because the mean of its divisors is an integer number (329301).

2^1097665 is an apocalyptic number.

It is an amenable number.

1097665 is a deficient number, since it is larger than the sum of its proper divisors (219539).

1097665 is an equidigital number, since it uses as much as digits as its factorization.

1097665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219538.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 1097665 is about 1047.6950892316. The cubic root of 1097665 is about 103.1549181636.

The spelling of 1097665 in words is "one million, ninety-seven thousand, six hundred sixty-five".