1155080 has 32 divisors (see below), whose sum is σ = 2643840. Its totient is φ = 454080.

The previous prime is 1155071. The next prime is 1155097. The reversal of 1155080 is 805511.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2465 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (82620).

2^1155080 is an apocalyptic number.

1155080 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 1155080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321920).

1155080 is an abundant number, since it is smaller than the sum of its proper divisors (1488760).

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

1155080 is a wasteful number, since it uses less digits than its factorization.

1155080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1155080 is about 1074.7464817342. The cubic root of 1155080 is about 104.9229972090.

The spelling of 1155080 in words is "one million, one hundred fifty-five thousand, eighty".