1223305 has 8 divisors (see below), whose sum is σ = 1485000. Its totient is φ = 967296.

The previous prime is 1223281. The next prime is 1223309. The reversal of 1223305 is 5033221.

It can be written as a sum of positive squares in 4 ways, for example, as 4489 + 1218816 = 67^2 + 1104^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223305 - 2⁷ = 1223177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (185625).

2^1223305 is an apocalyptic number.

It is an amenable number.

1223305 is a deficient number, since it is larger than the sum of its proper divisors (261695).

1223305 is an equidigital number, since it uses as much as digits as its factorization.

1223305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 1223305 is about 1106.0311930502. The cubic root of 1223305 is about 106.9493748344.

Adding to 1223305 its reverse (5033221), we get a palindrome (6256526).

The spelling of 1223305 in words is "one million, two hundred twenty-three thousand, three hundred five".