1220533025 has 12 divisors (see below), whose sum is σ = 1542018492. Its totient is φ = 958002240.

The previous prime is 1220532983. The next prime is 1220533031. The reversal of 1220533025 is 5203350221.

It can be written as a sum of positive squares in 6 ways, for example, as 1056784 + 1219476241 = 1028^2 + 34921^2 .

It is not a de Polignac number, because 1220533025 - 2¹⁴ = 1220516641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459254 + ... + 461903.

It is an arithmetic number, because the mean of its divisors is an integer number (128501541).

Almost surely, 2^1220533025 is an apocalyptic number.

It is an amenable number.

1220533025 is a deficient number, since it is larger than the sum of its proper divisors (321485467).

1220533025 is an equidigital number, since it uses as much as digits as its factorization.

1220533025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921220 (or 921215 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1220533025 is about 34936.1277905838. The cubic root of 1220533025 is about 1068.6853230813.

Adding to 1220533025 its reverse (5203350221), we get a palindrome (6423883246).

The spelling of 1220533025 in words is "one billion, two hundred twenty million, five hundred thirty-three thousand, twenty-five".