1220045473 has 2 divisors, whose sum is σ = 1220045474. Its totient is φ = 1220045472.

The previous prime is 1220045429. The next prime is 1220045501. The reversal of 1220045473 is 3745400221.

It is an a-pointer prime, because the next prime (1220045501) can be obtained adding 1220045473 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812934144 + 407111329 = 28512^2 + 20177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220045473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220045173) by changing a digit.

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 as a sum of consecutive naturals, namely, 610022736 + 610022737.

It is an arithmetic number, because the mean of its divisors is an integer number (610022737).

Almost surely, 2^1220045473 is an apocalyptic number.

It is an amenable number.

1220045473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220045473 is an equidigital number, since it uses as much as digits as its factorization.

1220045473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 1220045473 is about 34929.1493311818. The cubic root of 1220045473 is about 1068.5430057360.

Adding to 1220045473 its reverse (3745400221), we get a palindrome (4965445694).

The spelling of 1220045473 in words is "one billion, two hundred twenty million, forty-five thousand, four hundred seventy-three".