1115520 has 128 divisors (see below), whose sum is σ = 4112640. Its totient is φ = 251904.

The previous prime is 1115519. The next prime is 1115531. The reversal of 1115520 is 255111.

1115520 = T₆₅ + T₆₆ + ... + T₁₉₀.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1115520.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13399 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (32130).

2^1115520 is an apocalyptic number.

1115520 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 1115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2056320).

1115520 is an abundant number, since it is smaller than the sum of its proper divisors (2997120).

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

1115520 is an equidigital number, since it uses as much as digits as its factorization.

1115520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1115520 is about 1056.1818025321. The cubic root of 1115520 is about 103.7112304943.

It can be divided in two parts, 11155 and 20, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 1115520 in words is "one million, one hundred fifteen thousand, five hundred twenty".