1206563 has 2 divisors, whose sum is σ = 1206564. Its totient is φ = 1206562.

The previous prime is 1206553. The next prime is 1206577. The reversal of 1206563 is 3656021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1206563 - 2⁸ = 1206307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1206553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603281 + 603282.

It is an arithmetic number, because the mean of its divisors is an integer number (603282).

2^1206563 is an apocalyptic number.

1206563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206563 is an equidigital number, since it uses as much as digits as its factorization.

1206563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1206563 is about 1098.4366162870. The cubic root of 1206563 is about 106.4592333704.

The spelling of 1206563 in words is "one million, two hundred six thousand, five hundred sixty-three".