1320402120 has 64 divisors (see below), whose sum is σ = 3963997440. Its totient is φ = 351859200.

The previous prime is 1320402113. The next prime is 1320402133. The reversal of 1320402120 is 212040231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1320402120.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 221580 + ... + 227460.

It is an arithmetic number, because the mean of its divisors is an integer number (61937460).

Almost surely, 2^1320402120 is an apocalyptic number.

1320402120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320402120 is an abundant number, since it is smaller than the sum of its proper divisors (2643595320).

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

1320402120 is a wasteful number, since it uses less digits than its factorization.

1320402120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7766 (or 7762 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1320402120 is about 36337.3378221355. The cubic root of 1320402120 is about 1097.0726906120.

Adding to 1320402120 its reverse (212040231), we get a palindrome (1532442351).

The spelling of 1320402120 in words is "one billion, three hundred twenty million, four hundred two thousand, one hundred twenty".