1115540 has 36 divisors (see below), whose sum is σ = 2501436. Its totient is φ = 417792.

The previous prime is 1115539. The next prime is 1115551. The reversal of 1115540 is 455111.

It can be written as a sum of positive squares in 6 ways, for example, as 8836 + 1106704 = 94^2 + 1052^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5684 + ... + 5876.

2^1115540 is an apocalyptic number.

1115540 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 1115540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250718).

1115540 is an abundant number, since it is smaller than the sum of its proper divisors (1385896).

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

1115540 is a wasteful number, since it uses less digits than its factorization.

1115540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1115540 is about 1056.1912705566. The cubic root of 1115540 is about 103.7118502985.

It can be divided in two parts, 11 and 15540, that added together give a palindrome (15551).

The spelling of 1115540 in words is "one million, one hundred fifteen thousand, five hundred forty".