1220524520 has 64 divisors (see below), whose sum is σ = 2920898880. Its totient is φ = 457409536.

The previous prime is 1220524507. The next prime is 1220524541. The reversal of 1220524520 is 254250221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150407 + ... + 158313.

It is an arithmetic number, because the mean of its divisors is an integer number (45639045).

Almost surely, 2^1220524520 is an apocalyptic number.

1220524520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220524520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460449440).

1220524520 is an abundant number, since it is smaller than the sum of its proper divisors (1700374360).

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

1220524520 is a wasteful number, since it uses less digits than its factorization.

1220524520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8162 (or 8158 counting only the distinct ones).

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

The square root of 1220524520 is about 34936.0060682385. The cubic root of 1220524520 is about 1068.6828407806.

Adding to 1220524520 its reverse (254250221), we get a palindrome (1474774741).

The spelling of 1220524520 in words is "one billion, two hundred twenty million, five hundred twenty-four thousand, five hundred twenty".