1001365 has 4 divisors (see below), whose sum is σ = 1201644. Its totient is φ = 801088.

The previous prime is 1001353. The next prime is 1001369. The reversal of 1001365 is 5631001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5631001 = 73 ⋅77137.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 695556 = 553^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001365 - 2⁷ = 1001237 is a prime.

It is a Duffinian number.

1001365 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001369) 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, 100132 + ... + 100141.

It is an arithmetic number, because the mean of its divisors is an integer number (300411).

2^1001365 is an apocalyptic number.

It is an amenable number.

1001365 is a deficient number, since it is larger than the sum of its proper divisors (200279).

1001365 is an equidigital number, since it uses as much as digits as its factorization.

1001365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200278.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1001365 is about 1000.6822672557. The cubic root of 1001365 is about 100.0454793132.

Adding to 1001365 its reverse (5631001), we get a palindrome (6632366).

The spelling of 1001365 in words is "one million, one thousand, three hundred sixty-five".