1220342273 has 2 divisors, whose sum is σ = 1220342274. Its totient is φ = 1220342272.

The previous prime is 1220342267. The next prime is 1220342323. The reversal of 1220342273 is 3722430221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 724255744 + 496086529 = 26912^2 + 22273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220342273 - 2¹⁰ = 1220341249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220342213) 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, 610171136 + 610171137.

It is an arithmetic number, because the mean of its divisors is an integer number (610171137).

Almost surely, 2^1220342273 is an apocalyptic number.

It is an amenable number.

1220342273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220342273 is an equidigital number, since it uses as much as digits as its factorization.

1220342273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 1220342273 is about 34933.3976732868. The cubic root of 1220342273 is about 1068.6296467280.

Adding to 1220342273 its reverse (3722430221), we get a palindrome (4942772494).

The spelling of 1220342273 in words is "one billion, two hundred twenty million, three hundred forty-two thousand, two hundred seventy-three".