1115779 has 8 divisors (see below), whose sum is σ = 1301600. Its totient is φ = 956088.

The previous prime is 1115773. The next prime is 1115789. The reversal of 1115779 is 9775111.

It is not a de Polignac number, because 1115779 - 2³ = 1115771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1115779.

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 (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284 + ... + 1969.

It is an arithmetic number, because the mean of its divisors is an integer number (162700).

2^1115779 is an apocalyptic number.

1115779 is a deficient number, since it is larger than the sum of its proper divisors (185821).

1115779 is an frugal number, since it uses more digits than its factorization.

1115779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274 (or 3260 counting only the distinct ones).

The product of its digits is 2205, while the sum is 31.

The square root of 1115779 is about 1056.3044068828. The cubic root of 1115779 is about 103.7192563865.

It can be divided in two parts, 11157 and 79, that added together give a square (11236 = 106²).

The spelling of 1115779 in words is "one million, one hundred fifteen thousand, seven hundred seventy-nine".