1220305052 has 6 divisors (see below), whose sum is σ = 2135533848. Its totient is φ = 610152524.

The previous prime is 1220305013. The next prime is 1220305057. The reversal of 1220305052 is 2505030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220305057) 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, 152538128 + ... + 152538135.

It is an arithmetic number, because the mean of its divisors is an integer number (355922308).

Almost surely, 2^1220305052 is an apocalyptic number.

It is an amenable number.

1220305052 is a deficient number, since it is larger than the sum of its proper divisors (915228796).

1220305052 is a wasteful number, since it uses less digits than its factorization.

1220305052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305076267 (or 305076265 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1220305052 is about 34932.8649268851. The cubic root of 1220305052 is about 1068.6187820525.

Adding to 1220305052 its reverse (2505030221), we get a palindrome (3725335273).

The spelling of 1220305052 in words is "one billion, two hundred twenty million, three hundred five thousand, fifty-two".