1328563 has 2 divisors, whose sum is σ = 1328564. Its totient is φ = 1328562.

The previous prime is 1328539. The next prime is 1328573. The reversal of 1328563 is 3658231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1328563 - 2⁵ = 1328531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664281 + 664282.

It is an arithmetic number, because the mean of its divisors is an integer number (664282).

2^1328563 is an apocalyptic number.

1328563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328563 is an equidigital number, since it uses as much as digits as its factorization.

1328563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 1328563 is about 1152.6330725777. The cubic root of 1328563 is about 109.9328239984.

It can be divided in two parts, 1328 and 563, that added together give a triangular number (1891 = T₆₁).

The spelling of 1328563 in words is "one million, three hundred twenty-eight thousand, five hundred sixty-three".