1100543120 has 20 divisors (see below), whose sum is σ = 2558762940. Its totient is φ = 440217216.

The previous prime is 1100543083. The next prime is 1100543131. The reversal of 1100543120 is 213450011.

It can be written as a sum of positive squares in 2 ways, for example, as 422878096 + 677665024 = 20564^2 + 26032^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1100543120² = 2422390317958668800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6878315 + ... + 6878474.

It is an arithmetic number, because the mean of its divisors is an integer number (127938147).

Almost surely, 2^1100543120 is an apocalyptic number.

1100543120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100543120 is an abundant number, since it is smaller than the sum of its proper divisors (1458219820).

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

1100543120 is a wasteful number, since it uses less digits than its factorization.

1100543120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13756802 (or 13756796 counting only the distinct ones).

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

The square root of 1100543120 is about 33174.4347351993. The cubic root of 1100543120 is about 1032.4499820408.

Adding to 1100543120 its reverse (213450011), we get a palindrome (1313993131).

The spelling of 1100543120 in words is "one billion, one hundred million, five hundred forty-three thousand, one hundred twenty".