1226563 has 4 divisors (see below), whose sum is σ = 1320928. Its totient is φ = 1132200.

The previous prime is 1226557. The next prime is 1226581. The reversal of 1226563 is 3656221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3656221 = 97 ⋅37693.

It is a cyclic number.

It is not a de Polignac number, because 1226563 - 2⁵ = 1226531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226503) 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, 47163 + ... + 47188.

It is an arithmetic number, because the mean of its divisors is an integer number (330232).

2^1226563 is an apocalyptic number.

1226563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1226563 is a deficient number, since it is larger than the sum of its proper divisors (94365).

1226563 is an equidigital number, since it uses as much as digits as its factorization.

1226563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94364.

The product of its digits is 2160, while the sum is 25.

The square root of 1226563 is about 1107.5030473999. The cubic root of 1226563 is about 107.0442359384.

The spelling of 1226563 in words is "one million, two hundred twenty-six thousand, five hundred sixty-three".