1316657 has 2 divisors, whose sum is σ = 1316658. Its totient is φ = 1316656.

The previous prime is 1316647. The next prime is 1316669. The reversal of 1316657 is 7566131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 7921 = 1144^2 + 89^2 .

It is an emirp because it is prime and its reverse (7566131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1316657 - 2⁶ = 1316593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1316647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658328 + 658329.

It is an arithmetic number, because the mean of its divisors is an integer number (658329).

2^1316657 is an apocalyptic number.

It is an amenable number.

1316657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316657 is an equidigital number, since it uses as much as digits as its factorization.

1316657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 1316657 is about 1147.4567529977. The cubic root of 1316657 is about 109.6034481750.

The spelling of 1316657 in words is "one million, three hundred sixteen thousand, six hundred fifty-seven".