1321204800 has 84 divisors (see below), whose sum is σ = 4334668496. Its totient is φ = 352320000.

The previous prime is 1321204789. The next prime is 1321204867. The reversal of 1321204800 is 84021231.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132826 + ... + 142425.

Almost surely, 2^1321204800 is an apocalyptic number.

1321204800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321204800 is an abundant number, since it is smaller than the sum of its proper divisors (3013463696).

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

1321204800 is a wasteful number, since it uses less digits than its factorization.

1321204800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275276 (or 275261 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1321204800 is about 36348.3809818264. The cubic root of 1321204800 is about 1097.2949511679.

The spelling of 1321204800 in words is "one billion, three hundred twenty-one million, two hundred four thousand, eight hundred".