1321224530 has 16 divisors (see below), whose sum is σ = 2518098840. Its totient is φ = 497402112.

The previous prime is 1321224529. The next prime is 1321224533. The reversal of 1321224530 is 354221231.

It can be written as a sum of positive squares in 4 ways, for example, as 1047752161 + 273472369 = 32369^2 + 16537^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321224496 and 1321224505.

It is not an unprimeable number, because it can be changed into a prime (1321224533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3885785 + ... + 3886124.

Almost surely, 2^1321224530 is an apocalyptic number.

1321224530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321224530 is a deficient number, since it is larger than the sum of its proper divisors (1196874310).

1321224530 is a wasteful number, since it uses less digits than its factorization.

1321224530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7771933.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1321224530 is about 36348.6523821723. The cubic root of 1321224530 is about 1097.3004132334.

Adding to 1321224530 its reverse (354221231), we get a palindrome (1675445761).

The spelling of 1321224530 in words is "one billion, three hundred twenty-one million, two hundred twenty-four thousand, five hundred thirty".