1121160720 has 40 divisors (see below), whose sum is σ = 3475598976. Its totient is φ = 298976128.

The previous prime is 1121160713. The next prime is 1121160743. The reversal of 1121160720 is 270611211.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2335512 + ... + 2335991.

Almost surely, 2^1121160720 is an apocalyptic number.

1121160720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121160720 is an abundant number, since it is smaller than the sum of its proper divisors (2354438256).

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

1121160720 is a wasteful number, since it uses less digits than its factorization.

1121160720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671519 (or 4671513 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1121160720 is about 33483.7381425671. The cubic root of 1121160720 is about 1038.8574483999.

Adding to 1121160720 its reverse (270611211), we get a palindrome (1391771931).

The spelling of 1121160720 in words is "one billion, one hundred twenty-one million, one hundred sixty thousand, seven hundred twenty".