1155680 has 48 divisors (see below), whose sum is σ = 2830464. Its totient is φ = 445440.

The previous prime is 1155659. The next prime is 1155689. The reversal of 1155680 is 865511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4844 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2^1155680 is an apocalyptic number.

1155680 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 1155680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415232).

1155680 is an abundant number, since it is smaller than the sum of its proper divisors (1674784).

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

1155680 is a wasteful number, since it uses less digits than its factorization.

1155680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1155680 is about 1075.0255810910. The cubic root of 1155680 is about 104.9411612903.

The spelling of 1155680 in words is "one million, one hundred fifty-five thousand, six hundred eighty".