1121812480 has 128 divisors (see below), whose sum is σ = 2774489760. Its totient is φ = 435159040.

The previous prime is 1121812451. The next prime is 1121812487. The reversal of 1121812480 is 842181211.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121812487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6717357 + ... + 6717523.

Almost surely, 2^1121812480 is an apocalyptic number.

1121812480 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 1121812480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387244880).

1121812480 is an abundant number, since it is smaller than the sum of its proper divisors (1652677280).

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

1121812480 is an frugal number, since it uses more digits than its factorization.

1121812480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1121812480 is about 33493.4692141617. The cubic root of 1121812480 is about 1039.0587143910.

Adding to 1121812480 its reverse (842181211), we get a palindrome (1963993691).

The spelling of 1121812480 in words is "one billion, one hundred twenty-one million, eight hundred twelve thousand, four hundred eighty".