1118720 has 80 divisors (see below), whose sum is σ = 2946240. Its totient is φ = 405504.

The previous prime is 1118717. The next prime is 1118723. The reversal of 1118720 is 278111.

It is an interprime number because it is at equal distance from previous prime (1118717) and next prime (1118723).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 1118692 and 1118701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118723) 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, 48629 + ... + 48651.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2^1118720 is an apocalyptic number.

1118720 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 1118720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473120).

1118720 is an abundant number, since it is smaller than the sum of its proper divisors (1827520).

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

1118720 is an equidigital number, since it uses as much as digits as its factorization.

1118720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1118720 is about 1057.6956083865. The cubic root of 1118720 is about 103.8103050964.

The spelling of 1118720 in words is "one million, one hundred eighteen thousand, seven hundred twenty".