1115778 has 16 divisors (see below), whose sum is σ = 2363040. Its totient is φ = 350016.

The previous prime is 1115773. The next prime is 1115789. The reversal of 1115778 is 8775111.

It is a happy number.

It is a plaindrome in base 10.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5368 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (147690).

2^1115778 is an apocalyptic number.

1115778 is an abundant number, since it is smaller than the sum of its proper divisors (1247262).

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

1115778 is a wasteful number, since it uses less digits than its factorization.

1115778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10961.

The product of its digits is 1960, while the sum is 30.

The square root of 1115778 is about 1056.3039335343. The cubic root of 1115778 is about 103.7192254009.

The spelling of 1115778 in words is "one million, one hundred fifteen thousand, seven hundred seventy-eight".