1115559 has 16 divisors (see below), whose sum is σ = 1676800. Its totient is φ = 732888.

The previous prime is 1115551. The next prime is 1115561. The reversal of 1115559 is 9555111.

1115559 = T₁₂₇ + T₁₂₈ + ... + T₂₀₅.

It is not a de Polignac number, because 1115559 - 2³ = 1115551 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1872 + ... + 2394.

It is an arithmetic number, because the mean of its divisors is an integer number (104800).

2^1115559 is an apocalyptic number.

1115559 is a deficient number, since it is larger than the sum of its proper divisors (561241).

1115559 is an equidigital number, since it uses as much as digits as its factorization.

1115559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 605 counting only the distinct ones).

The product of its digits is 1125, while the sum is 27.

The square root of 1115559 is about 1056.2002651013. The cubic root of 1115559 is about 103.7124391057.

The spelling of 1115559 in words is "one million, one hundred fifteen thousand, five hundred fifty-nine".