1145565 has 12 divisors (see below), whose sum is σ = 1985724. Its totient is φ = 610944.

The previous prime is 1145539. The next prime is 1145593. The reversal of 1145565 is 5655411.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 171396 + 974169 = 414^2 + 987^2 .

It is not a de Polignac number, because 1145565 - 2⁵ = 1145533 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

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 11 ways as a sum of consecutive naturals, for example, 12684 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (165477).

2^1145565 is an apocalyptic number.

1145565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145565 is a deficient number, since it is larger than the sum of its proper divisors (840159).

1145565 is a wasteful number, since it uses less digits than its factorization.

1145565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25468 (or 25465 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1145565 is about 1070.3107025532. The cubic root of 1145565 is about 104.6341005603.

The spelling of 1145565 in words is "one million, one hundred forty-five thousand, five hundred sixty-five".