1223045305 has 8 divisors (see below), whose sum is σ = 1471046472. Its totient is φ = 976174848.

The previous prime is 1223045287. The next prime is 1223045321. The reversal of 1223045305 is 5035403221.

It can be written as a sum of positive squares in 4 ways, for example, as 29550096 + 1193495209 = 5436^2 + 34547^2 .

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 1223045305 - 2⁵ = 1223045273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223045305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280294 + ... + 284623.

It is an arithmetic number, because the mean of its divisors is an integer number (183880809).

Almost surely, 2^1223045305 is an apocalyptic number.

It is an amenable number.

1223045305 is a deficient number, since it is larger than the sum of its proper divisors (248001167).

1223045305 is an equidigital number, since it uses as much as digits as its factorization.

1223045305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565355.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1223045305 is about 34972.0646373645. The cubic root of 1223045305 is about 1069.4180621671.

Adding to 1223045305 its reverse (5035403221), we get a palindrome (6258448526).

The spelling of 1223045305 in words is "one billion, two hundred twenty-three million, forty-five thousand, three hundred five".