1115730 has 144 divisors (see below), whose sum is σ = 3841344. Its totient is φ = 221760.

The previous prime is 1115713. The next prime is 1115731. The reversal of 1115730 is 375111.

Added to its reverse (375111) it gives a square (1490841 = 1221²).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115731) 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 71 ways as a sum of consecutive naturals, for example, 48499 + ... + 48521.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2^1115730 is an apocalyptic number.

1115730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920672).

1115730 is an abundant number, since it is smaller than the sum of its proper divisors (2725614).

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

1115730 is a wasteful number, since it uses less digits than its factorization.

1115730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 18.

The square root of 1115730 is about 1056.2812125566. The cubic root of 1115730 is about 103.7177380698.

Adding to 1115730 its reverse (375111), we get a square (1490841 = 1221²).

The spelling of 1115730 in words is "one million, one hundred fifteen thousand, seven hundred thirty".