1312565 has 4 divisors (see below), whose sum is σ = 1575084. Its totient is φ = 1050048.

The previous prime is 1312561. The next prime is 1312567. The reversal of 1312565 is 5652131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5652131 = 1811 ⋅3121.

It can be written as a sum of positive squares in 2 ways, for example, as 707281 + 605284 = 841^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312565 - 2² = 1312561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312561) 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, 131252 + ... + 131261.

It is an arithmetic number, because the mean of its divisors is an integer number (393771).

2^1312565 is an apocalyptic number.

It is an amenable number.

1312565 is a deficient number, since it is larger than the sum of its proper divisors (262519).

1312565 is an equidigital number, since it uses as much as digits as its factorization.

1312565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262518.

The product of its digits is 900, while the sum is 23.

The square root of 1312565 is about 1145.6722917135. The cubic root of 1312565 is about 109.4897858880.

Adding to 1312565 its reverse (5652131), we get a palindrome (6964696).

The spelling of 1312565 in words is "one million, three hundred twelve thousand, five hundred sixty-five".