1013565 has 32 divisors (see below), whose sum is σ = 1900800. Its totient is φ = 460992.

The previous prime is 1013563. The next prime is 1013569. The reversal of 1013565 is 5653101.

It is a happy number.

It is not a de Polignac number, because 1013565 - 2¹ = 1013563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5047 + ... + 5243.

It is an arithmetic number, because the mean of its divisors is an integer number (59400).

2^1013565 is an apocalyptic number.

1013565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1013565 is a deficient number, since it is larger than the sum of its proper divisors (887235).

1013565 is an equidigital number, since it uses as much as digits as its factorization.

1013565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1013565 is about 1006.7596535420. The cubic root of 1013565 is about 100.4501373897.

Adding to 1013565 its reverse (5653101), we get a palindrome (6666666).

The spelling of 1013565 in words is "one million, thirteen thousand, five hundred sixty-five".