1316647 has 2 divisors, whose sum is σ = 1316648. Its totient is φ = 1316646.

The previous prime is 1316639. The next prime is 1316657. The reversal of 1316647 is 7466131.

It is a weak prime.

It is an emirp because it is prime and its reverse (7466131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1316647 - 2³ = 1316639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658323 + 658324.

It is an arithmetic number, because the mean of its divisors is an integer number (658324).

2^1316647 is an apocalyptic number.

1316647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316647 is an equidigital number, since it uses as much as digits as its factorization.

1316647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 1316647 is about 1147.4523955267. The cubic root of 1316647 is about 109.6031706952.

The spelling of 1316647 in words is "one million, three hundred sixteen thousand, six hundred forty-seven".