1316665 has 8 divisors (see below), whose sum is σ = 1805760. Its totient is φ = 902832.

The previous prime is 1316657. The next prime is 1316669. The reversal of 1316665 is 5666131.

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

It is not a de Polignac number, because 1316665 - 2³ = 1316657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1316669) 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, 18775 + ... + 18844.

It is an arithmetic number, because the mean of its divisors is an integer number (225720).

2^1316665 is an apocalyptic number.

It is an amenable number.

1316665 is a deficient number, since it is larger than the sum of its proper divisors (489095).

1316665 is an equidigital number, since it uses as much as digits as its factorization.

1316665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37631.

The product of its digits is 3240, while the sum is 28.

The square root of 1316665 is about 1147.4602389626. The cubic root of 1316665 is about 109.6036701579.

It can be divided in two parts, 13166 and 65, that added together give a palindrome (13231).

The spelling of 1316665 in words is "one million, three hundred sixteen thousand, six hundred sixty-five".