1220045504 has 14 divisors (see below), whose sum is σ = 2421027924. Its totient is φ = 610022720.

The previous prime is 1220045503. The next prime is 1220045507. The reversal of 1220045504 is 4055400221.

It is a happy number.

It is a super-2 number, since 2×1220045504² = 2977022063661228032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220045504.

It is not an unprimeable number, because it can be changed into a prime (1220045501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9531542 + ... + 9531669.

It is an arithmetic number, because the mean of its divisors is an integer number (172930566).

Almost surely, 2^1220045504 is an apocalyptic number.

It is an amenable number.

1220045504 is a deficient number, since it is larger than the sum of its proper divisors (1200982420).

1220045504 is an equidigital number, since it uses as much as digits as its factorization.

1220045504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19063223 (or 19063213 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1220045504 is about 34929.1497749373. The cubic root of 1220045504 is about 1068.5430147861.

Adding to 1220045504 its reverse (4055400221), we get a palindrome (5275445725).

The spelling of 1220045504 in words is "one billion, two hundred twenty million, forty-five thousand, five hundred four".