1220545244 has 12 divisors (see below), whose sum is σ = 2141592600. Its totient is φ = 608661648.

The previous prime is 1220545241. The next prime is 1220545253. The reversal of 1220545244 is 4425450221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220545241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401039 + ... + 404070.

It is an arithmetic number, because the mean of its divisors is an integer number (178466050).

Almost surely, 2^1220545244 is an apocalyptic number.

It is an amenable number.

1220545244 is a deficient number, since it is larger than the sum of its proper divisors (921047356).

1220545244 is a wasteful number, since it uses less digits than its factorization.

1220545244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805492 (or 805490 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1220545244 is about 34936.3026664242. The cubic root of 1220545244 is about 1068.6888893435.

Adding to 1220545244 its reverse (4425450221), we get a palindrome (5645995465).

The spelling of 1220545244 in words is "one billion, two hundred twenty million, five hundred forty-five thousand, two hundred forty-four".