1143021544 has 64 divisors (see below), whose sum is σ = 2550499200. Its totient is φ = 469857024.

The previous prime is 1143021497. The next prime is 1143021557. The reversal of 1143021544 is 4451203411.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252727 + ... + 257209.

It is an arithmetic number, because the mean of its divisors is an integer number (39851550).

Almost surely, 2^1143021544 is an apocalyptic number.

1143021544 is a gapful number since it is divisible by the number (14) 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 1143021544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275249600).

1143021544 is an abundant number, since it is smaller than the sum of its proper divisors (1407477656).

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

1143021544 is a wasteful number, since it uses less digits than its factorization.

1143021544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682 (or 4678 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1143021544 is about 33808.6016273965. The cubic root of 1143021544 is about 1045.5660475825.

Adding to 1143021544 its reverse (4451203411), we get a palindrome (5594224955).

The spelling of 1143021544 in words is "one billion, one hundred forty-three million, twenty-one thousand, five hundred forty-four".