1209563 has 2 divisors, whose sum is σ = 1209564. Its totient is φ = 1209562.

The previous prime is 1209557. The next prime is 1209577. The reversal of 1209563 is 3659021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1209563 - 2¹² = 1205467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1209583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604781 + 604782.

It is an arithmetic number, because the mean of its divisors is an integer number (604782).

2^1209563 is an apocalyptic number.

1209563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209563 is an equidigital number, since it uses as much as digits as its factorization.

1209563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1209563 is about 1099.8013456984. The cubic root of 1209563 is about 106.5473938076.

The spelling of 1209563 in words is "one million, two hundred nine thousand, five hundred sixty-three".