1312665 has 8 divisors (see below), whose sum is σ = 2100288. Its totient is φ = 700080.

The previous prime is 1312657. The next prime is 1312667. The reversal of 1312665 is 5662131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312665 - 2³ = 1312657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43741 + ... + 43770.

It is an arithmetic number, because the mean of its divisors is an integer number (262536).

2^1312665 is an apocalyptic number.

1312665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312665 is a deficient number, since it is larger than the sum of its proper divisors (787623).

1312665 is an equidigital number, since it uses as much as digits as its factorization.

1312665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87519.

The product of its digits is 1080, while the sum is 24.

The square root of 1312665 is about 1145.7159333796. The cubic root of 1312665 is about 109.4925663726.

Adding to 1312665 its reverse (5662131), we get a palindrome (6974796).

The spelling of 1312665 in words is "one million, three hundred twelve thousand, six hundred sixty-five".