1220265044 has 24 divisors (see below), whose sum is σ = 2271044160. Its totient is φ = 572057856.

The previous prime is 1220265043. The next prime is 1220265061. The reversal of 1220265044 is 4405620221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220265043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75392 + ... + 90135.

It is an arithmetic number, because the mean of its divisors is an integer number (94626840).

Almost surely, 2^1220265044 is an apocalyptic number.

It is an amenable number.

1220265044 is a deficient number, since it is larger than the sum of its proper divisors (1050779116).

1220265044 is a wasteful number, since it uses less digits than its factorization.

1220265044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165647 (or 165645 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1220265044 is about 34932.2922809254. The cubic root of 1220265044 is about 1068.6071036154.

Adding to 1220265044 its reverse (4405620221), we get a palindrome (5625885265).

The spelling of 1220265044 in words is "one billion, two hundred twenty million, two hundred sixty-five thousand, forty-four".