1143541520 has 80 divisors (see below), whose sum is σ = 2905528320. Its totient is φ = 415104000.

The previous prime is 1143541519. The next prime is 1143541559. The reversal of 1143541520 is 251453411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1143541520.

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, 992945 + ... + 994095.

It is an arithmetic number, because the mean of its divisors is an integer number (36319104).

Almost surely, 2^1143541520 is an apocalyptic number.

1143541520 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 1143541520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452764160).

1143541520 is an abundant number, since it is smaller than the sum of its proper divisors (1761986800).

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

1143541520 is a wasteful number, since it uses less digits than its factorization.

1143541520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1143541520 is about 33816.2907486909. The cubic root of 1143541520 is about 1045.7245709378.

Adding to 1143541520 its reverse (251453411), we get a palindrome (1394994931).

The spelling of 1143541520 in words is "one billion, one hundred forty-three million, five hundred forty-one thousand, five hundred twenty".