1115775 has 60 divisors (see below), whose sum is σ = 2250600. Its totient is φ = 544320.

The previous prime is 1115773. The next prime is 1115789. The reversal of 1115775 is 5775111.

It is not a de Polignac number, because 1115775 - 2¹ = 1115773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1115775 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115771) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 38461 + ... + 38489.

It is an arithmetic number, because the mean of its divisors is an integer number (37510).

2^1115775 is an apocalyptic number.

1115775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1115775 is an abundant number, since it is smaller than the sum of its proper divisors (1134825).

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

1115775 is a wasteful number, since it uses less digits than its factorization.

1115775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 56 counting only the distinct ones).

The product of its digits is 1225, while the sum is 27.

The square root of 1115775 is about 1056.3025134875. The cubic root of 1115775 is about 103.7191324440.

It can be divided in two parts, 111 and 5775, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 1115775 in words is "one million, one hundred fifteen thousand, seven hundred seventy-five".