1312165 has 4 divisors (see below), whose sum is σ = 1574604. Its totient is φ = 1049728.

The previous prime is 1312153. The next prime is 1312169. The reversal of 1312165 is 5612131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5612131 = 7 ⋅801733.

It can be written as a sum of positive squares in 2 ways, for example, as 1014049 + 298116 = 1007^2 + 546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312165 - 2⁵ = 1312133 is a prime.

It is a Duffinian number.

1312165 is a lucky number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312169) 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, 131212 + ... + 131221.

It is an arithmetic number, because the mean of its divisors is an integer number (393651).

2^1312165 is an apocalyptic number.

It is an amenable number.

1312165 is a deficient number, since it is larger than the sum of its proper divisors (262439).

1312165 is an equidigital number, since it uses as much as digits as its factorization.

1312165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262438.

The product of its digits is 180, while the sum is 19.

The square root of 1312165 is about 1145.4977084220. The cubic root of 1312165 is about 109.4786625369.

Adding to 1312165 its reverse (5612131), we get a palindrome (6924296).

The spelling of 1312165 in words is "one million, three hundred twelve thousand, one hundred sixty-five".