1121856 has 28 divisors (see below), whose sum is σ = 2968752. Its totient is φ = 373888.

The previous prime is 1121839. The next prime is 1121867. The reversal of 1121856 is 6581211.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2730 + ... + 3113.

2^1121856 is an apocalyptic number.

1121856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1121856 is an abundant number, since it is smaller than the sum of its proper divisors (1846896).

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

1121856 is an equidigital number, since it uses as much as digits as its factorization.

1121856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858 (or 5848 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

The square root of 1121856 is about 1059.1770390261. The cubic root of 1121856 is about 103.9072150757.

The spelling of 1121856 in words is "one million, one hundred twenty-one thousand, eight hundred fifty-six".