1143004520 has 128 divisors (see below), whose sum is σ = 3142022400. Its totient is φ = 365285376.

The previous prime is 1143004507. The next prime is 1143004531. The reversal of 1143004520 is 254003411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1143004492 and 1143004501.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517739 + ... + 519941.

It is an arithmetic number, because the mean of its divisors is an integer number (24547050).

Almost surely, 2^1143004520 is an apocalyptic number.

1143004520 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 1143004520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571011200).

1143004520 is an abundant number, since it is smaller than the sum of its proper divisors (1999017880).

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

1143004520 is a wasteful number, since it uses less digits than its factorization.

1143004520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1143004520 is about 33808.3498562116. The cubic root of 1143004520 is about 1045.5608567194.

Adding to 1143004520 its reverse (254003411), we get a palindrome (1397007931).

The spelling of 1143004520 in words is "one billion, one hundred forty-three million, four thousand, five hundred twenty".