1223205045 has 8 divisors (see below), whose sum is σ = 1957128096. Its totient is φ = 652376016.

The previous prime is 1223205023. The next prime is 1223205079. The reversal of 1223205045 is 5405023221.

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

It is not a de Polignac number, because 1223205045 - 2⁹ = 1223204533 is a prime.

It is a super-2 number, since 2×1223205045² = 2992461164226904050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40773487 + ... + 40773516.

It is an arithmetic number, because the mean of its divisors is an integer number (244641012).

Almost surely, 2^1223205045 is an apocalyptic number.

1223205045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223205045 is a deficient number, since it is larger than the sum of its proper divisors (733923051).

1223205045 is an equidigital number, since it uses as much as digits as its factorization.

1223205045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81547011.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1223205045 is about 34974.3483856383. The cubic root of 1223205045 is about 1069.4646184704.

Adding to 1223205045 its reverse (5405023221), we get a palindrome (6628228266).

The spelling of 1223205045 in words is "one billion, two hundred twenty-three million, two hundred five thousand, forty-five".