1223126845 has 16 divisors (see below), whose sum is σ = 1505530800. Its totient is φ = 953565184.

The previous prime is 1223126837. The next prime is 1223126929. The reversal of 1223126845 is 5486213221.

It can be written as a sum of positive squares in 8 ways, for example, as 54375876 + 1168750969 = 7374^2 + 34187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223126845 - 2³ = 1223126837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223126845.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23997 + ... + 54973.

It is an arithmetic number, because the mean of its divisors is an integer number (94095675).

Almost surely, 2^1223126845 is an apocalyptic number.

It is an amenable number.

1223126845 is a deficient number, since it is larger than the sum of its proper divisors (282403955).

1223126845 is a wasteful number, since it uses less digits than its factorization.

1223126845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31184.

The product of its digits is 23040, while the sum is 34.

The square root of 1223126845 is about 34973.2304055545. The cubic root of 1223126845 is about 1069.4418275476.

The spelling of 1223126845 in words is "one billion, two hundred twenty-three million, one hundred twenty-six thousand, eight hundred forty-five".