1328671 has 2 divisors, whose sum is σ = 1328672. Its totient is φ = 1328670.

The previous prime is 1328653. The next prime is 1328683. The reversal of 1328671 is 1768231.

It is a strong prime.

It is an emirp because it is prime and its reverse (1768231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1328671 - 2¹¹ = 1326623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664335 + 664336.

It is an arithmetic number, because the mean of its divisors is an integer number (664336).

2^1328671 is an apocalyptic number.

1328671 is the 666-th hex number.

1328671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328671 is an equidigital number, since it uses as much as digits as its factorization.

1328671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 1328671 is about 1152.6799208800. The cubic root of 1328671 is about 109.9358027614.

The spelling of 1328671 in words is "one million, three hundred twenty-eight thousand, six hundred seventy-one".