1143321200 has 120 divisors (see below), whose sum is σ = 3304609920. Its totient is φ = 371347200.

The previous prime is 1143321173. The next prime is 1143321209. The reversal of 1143321200 is 21233411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143321209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42455 + ... + 63945.

It is an arithmetic number, because the mean of its divisors is an integer number (27538416).

Almost surely, 2^1143321200 is an apocalyptic number.

1143321200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143321200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652304960).

1143321200 is an abundant number, since it is smaller than the sum of its proper divisors (2161288720).

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

1143321200 is a wasteful number, since it uses less digits than its factorization.

1143321200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21535 (or 21524 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1143321200 is about 33813.0329902539. The cubic root of 1143321200 is about 1045.6574085797.

Adding to 1143321200 its reverse (21233411), we get a palindrome (1164554611).

The spelling of 1143321200 in words is "one billion, one hundred forty-three million, three hundred twenty-one thousand, two hundred".