1324120520 has 32 divisors (see below), whose sum is σ = 2983401720. Its totient is φ = 528913920.

The previous prime is 1324120513. The next prime is 1324120529. The reversal of 1324120520 is 250214231.

It can be written as a sum of positive squares in 4 ways, for example, as 1323649924 + 470596 = 36382^2 + 686^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1324120492 and 1324120501.

It is not an unprimeable number, because it can be changed into a prime (1324120529) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6740 + ... + 51900.

Almost surely, 2^1324120520 is an apocalyptic number.

1324120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1324120520 is an abundant number, since it is smaller than the sum of its proper divisors (1659281200).

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

1324120520 is a wasteful number, since it uses less digits than its factorization.

1324120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45905 (or 45901 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1324120520 is about 36388.4668542108. The cubic root of 1324120520 is about 1098.1015518718.

Adding to 1324120520 its reverse (250214231), we get a palindrome (1574334751).

The spelling of 1324120520 in words is "one billion, three hundred twenty-four million, one hundred twenty thousand, five hundred twenty".