1331717 has 4 divisors (see below), whose sum is σ = 1336236. Its totient is φ = 1327200.

The previous prime is 1331711. The next prime is 1331719. The reversal of 1331717 is 7171331.

It is a Cunningham number, because it is equal to 1154²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75076 + 1256641 = 274^2 + 1121^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331717 - 2¹⁸ = 1069573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331692 and 1331701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784 + ... + 2417.

It is an arithmetic number, because the mean of its divisors is an integer number (334059).

2^1331717 is an apocalyptic number.

It is an amenable number.

1331717 is a deficient number, since it is larger than the sum of its proper divisors (4519).

1331717 is an equidigital number, since it uses as much as digits as its factorization.

1331717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518.

The product of its digits is 441, while the sum is 23.

The square root of 1331717 is about 1154.0004332755. Note that the first 3 decimals coincide. The cubic root of 1331717 is about 110.0197485204.

It can be divided in two parts, 1331 and 717, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1331717 in words is "one million, three hundred thirty-one thousand, seven hundred seventeen".