1100720 has 20 divisors (see below), whose sum is σ = 2559360. Its totient is φ = 440256.

The previous prime is 1100683. The next prime is 1100747. The reversal of 1100720 is 270011.

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

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, 6800 + ... + 6959.

It is an arithmetic number, because the mean of its divisors is an integer number (127968).

2^1100720 is an apocalyptic number.

1100720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100720 is an abundant number, since it is smaller than the sum of its proper divisors (1458640).

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

1100720 is a wasteful number, since it uses less digits than its factorization.

1100720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13772 (or 13766 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 1100720 is about 1049.1520385530. The cubic root of 1100720 is about 103.2505291087.

Adding to 1100720 its reverse (270011), we get a palindrome (1370731).

The spelling of 1100720 in words is "one million, one hundred thousand, seven hundred twenty".