1320542500 has 30 divisors (see below), whose sum is σ = 2887767806. Its totient is φ = 528216000.

The previous prime is 1320542491. The next prime is 1320542501. The reversal of 1320542500 is 52450231.

It can be written as a sum of positive squares in 5 ways, for example, as 528908004 + 791634496 = 22998^2 + 28136^2 .

It is not an unprimeable number, because it can be changed into a prime (1320542501) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 261609 + ... + 266608.

Almost surely, 2^1320542500 is an apocalyptic number.

1320542500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320542500 is an abundant number, since it is smaller than the sum of its proper divisors (1567225306).

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

1320542500 is an equidigital number, since it uses as much as digits as its factorization.

1320542500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528241 (or 528224 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1320542500 is about 36339.2693927657. The cubic root of 1320542500 is about 1097.1115680632. Note that the first 3 decimals are identical.

Adding to 1320542500 its reverse (52450231), we get a palindrome (1372992731).

The spelling of 1320542500 in words is "one billion, three hundred twenty million, five hundred forty-two thousand, five hundred".