1143021500 has 48 divisors (see below), whose sum is σ = 2503562880. Its totient is φ = 455889600.

The previous prime is 1143021497. The next prime is 1143021557. The reversal of 1143021500 is 51203411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180386 + ... + 186614.

It is an arithmetic number, because the mean of its divisors is an integer number (52157560).

Almost surely, 2^1143021500 is an apocalyptic number.

1143021500 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 1143021500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251781440).

1143021500 is an abundant number, since it is smaller than the sum of its proper divisors (1360541380).

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

1143021500 is a wasteful number, since it uses less digits than its factorization.

1143021500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615 (or 6603 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1143021500 is about 33808.6009766746. The cubic root of 1143021500 is about 1045.5660341663.

Adding to 1143021500 its reverse (51203411), we get a palindrome (1194224911).

The spelling of 1143021500 in words is "one billion, one hundred forty-three million, twenty-one thousand, five hundred".