1220530506 has 48 divisors (see below), whose sum is σ = 2649640896. Its totient is φ = 374644608.

The previous prime is 1220530499. The next prime is 1220530529. The reversal of 1220530506 is 6050350221.

1220530506 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508846 + ... + 511238.

It is an arithmetic number, because the mean of its divisors is an integer number (55200852).

Almost surely, 2^1220530506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220530506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324820448).

1220530506 is an abundant number, since it is smaller than the sum of its proper divisors (1429110390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220530506 is a wasteful number, since it uses less digits than its factorization.

1220530506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1220530506 is about 34936.0917390598. The cubic root of 1220530506 is about 1068.6845878778.

Adding to 1220530506 its reverse (6050350221), we get a palindrome (7270880727).

The spelling of 1220530506 in words is "one billion, two hundred twenty million, five hundred thirty thousand, five hundred six".