1155040 has 24 divisors (see below), whose sum is σ = 2729160. Its totient is φ = 461952.

The previous prime is 1155019. The next prime is 1155053. The reversal of 1155040 is 405511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3450 + ... + 3769.

It is an arithmetic number, because the mean of its divisors is an integer number (113715).

2^1155040 is an apocalyptic number.

1155040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155040 is an abundant number, since it is smaller than the sum of its proper divisors (1574120).

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

1155040 is an equidigital number, since it uses as much as digits as its factorization.

1155040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7234 (or 7226 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1155040 is about 1074.7278725333. The cubic root of 1155040 is about 104.9217860466.

The spelling of 1155040 in words is "one million, one hundred fifty-five thousand, forty".