1222563 has 4 divisors (see below), whose sum is σ = 1630088. Its totient is φ = 815040.

The previous prime is 1222561. The next prime is 1222567. The reversal of 1222563 is 3652221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3652221 = 3 ⋅1217407.

It is not a de Polignac number, because 1222563 - 2¹ = 1222561 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203758 + ... + 203763.

It is an arithmetic number, because the mean of its divisors is an integer number (407522).

2^1222563 is an apocalyptic number.

1222563 is a deficient number, since it is larger than the sum of its proper divisors (407525).

1222563 is an equidigital number, since it uses as much as digits as its factorization.

1222563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407524.

The product of its digits is 720, while the sum is 21.

The square root of 1222563 is about 1105.6957085926. The cubic root of 1222563 is about 106.9277469530.

Adding to 1222563 its reverse (3652221), we get a palindrome (4874784).

The spelling of 1222563 in words is "one million, two hundred twenty-two thousand, five hundred sixty-three".