1320232520 has 32 divisors (see below), whose sum is σ = 3050811000. Its totient is φ = 513819648.

The previous prime is 1320232517. The next prime is 1320232531. The reversal of 1320232520 is 252320231.

It can be written as a sum of positive squares in 4 ways, for example, as 1260108004 + 60124516 = 35498^2 + 7754^2 .

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 = 1320232492 and 1320232501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444545 + ... + 447504.

Almost surely, 2^1320232520 is an apocalyptic number.

1320232520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320232520 is an abundant number, since it is smaller than the sum of its proper divisors (1730578480).

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

1320232520 is a wasteful number, since it uses less digits than its factorization.

1320232520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892097 (or 892093 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1320232520 is about 36335.0040594466. The cubic root of 1320232520 is about 1097.0257171705.

Adding to 1320232520 its reverse (252320231), we get a palindrome (1572552751).

The spelling of 1320232520 in words is "one billion, three hundred twenty million, two hundred thirty-two thousand, five hundred twenty".