1225020320 has 48 divisors (see below), whose sum is σ = 2993918760. Its totient is φ = 473109504.

The previous prime is 1225020311. The next prime is 1225020341. The reversal of 1225020320 is 230205221.

It can be written as a sum of positive squares in 4 ways, for example, as 623201296 + 601819024 = 24964^2 + 24532^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127367 + ... + 136646.

Almost surely, 2^1225020320 is an apocalyptic number.

1225020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225020320 is an abundant number, since it is smaller than the sum of its proper divisors (1768898440).

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

1225020320 is a wasteful number, since it uses less digits than its factorization.

1225020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264057 (or 264049 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1225020320 is about 35000.2902845105. The cubic root of 1225020320 is about 1069.9933967625.

Adding to 1225020320 its reverse (230205221), we get a palindrome (1455225541).

The spelling of 1225020320 in words is "one billion, two hundred twenty-five million, twenty thousand, three hundred twenty".