1115856 has 120 divisors (see below), whose sum is σ = 3791424. Its totient is φ = 311040.

The previous prime is 1115843. The next prime is 1115857. The reversal of 1115856 is 6585111.

It is a super-2 number, since 2×1115856² = 2490269225472, which contains 22 as substring.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115857) 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 23 ways as a sum of consecutive naturals, for example, 27196 + ... + 27236.

2^1115856 is an apocalyptic number.

1115856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895712).

1115856 is an abundant number, since it is smaller than the sum of its proper divisors (2675568).

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

1115856 is an equidigital number, since it uses as much as digits as its factorization.

1115856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 53 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 1115856 is about 1056.3408540807. The cubic root of 1115856 is about 103.7216422231.

1115856 divided by its sum of digits (27) gives a triangular number (41328 = T₂₈₇).

The spelling of 1115856 in words is "one million, one hundred fifteen thousand, eight hundred fifty-six".