1144565 has 4 divisors (see below), whose sum is σ = 1373484. Its totient is φ = 915648.

The previous prime is 1144537. The next prime is 1144573. The reversal of 1144565 is 5654411.

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 763876 + 380689 = 874^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144565 - 2¹⁴ = 1128181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114452 + ... + 114461.

It is an arithmetic number, because the mean of its divisors is an integer number (343371).

2^1144565 is an apocalyptic number.

It is an amenable number.

1144565 is a deficient number, since it is larger than the sum of its proper divisors (228919).

1144565 is an equidigital number, since it uses as much as digits as its factorization.

1144565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228918.

The product of its digits is 2400, while the sum is 26.

The square root of 1144565 is about 1069.8434464911. The cubic root of 1144565 is about 104.6036455558.

Adding to 1144565 its reverse (5654411), we get a palindrome (6798976).

The spelling of 1144565 in words is "one million, one hundred forty-four thousand, five hundred sixty-five".