1121340720 has 40 divisors (see below), whose sum is σ = 3476156976. Its totient is φ = 299024128.

The previous prime is 1121340719. The next prime is 1121340749. The reversal of 1121340720 is 270431211.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 2335887 + ... + 2336366.

Almost surely, 2^1121340720 is an apocalyptic number.

1121340720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121340720 is an abundant number, since it is smaller than the sum of its proper divisors (2354816256).

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

1121340720 is a wasteful number, since it uses less digits than its factorization.

1121340720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672269 (or 4672263 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1121340720 is about 33486.4259066267. The cubic root of 1121340720 is about 1038.9130408858.

Adding to 1121340720 its reverse (270431211), we get a palindrome (1391771931).

The spelling of 1121340720 in words is "one billion, one hundred twenty-one million, three hundred forty thousand, seven hundred twenty".