1188720 has 120 divisors (see below), whose sum is σ = 4333056. Its totient is φ = 290304.

The previous prime is 1188689. The next prime is 1188721. The reversal of 1188720 is 278811.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9297 + ... + 9423.

2^1188720 is an apocalyptic number.

1188720 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 1188720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2166528).

1188720 is an abundant number, since it is smaller than the sum of its proper divisors (3144336).

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

1188720 is a wasteful number, since it uses less digits than its factorization.

1188720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1188720 is about 1090.2843665760. The cubic root of 1188720 is about 105.9318417893.

Subtracting from 1188720 its reverse (278811), we obtain a palindrome (909909).

The spelling of 1188720 in words is "one million, one hundred eighty-eight thousand, seven hundred twenty".