1122816 has 80 divisors (see below), whose sum is σ = 3240864. Its totient is φ = 344064.

The previous prime is 1122811. The next prime is 1122841. The reversal of 1122816 is 6182211.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a nialpdrome in base 8.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1122792 and 1122801.

It is not an unprimeable number, because it can be changed into a prime (1122811) 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, 26091 + ... + 26133.

2^1122816 is an apocalyptic number.

1122816 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 1122816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620432).

1122816 is an abundant number, since it is smaller than the sum of its proper divisors (2118048).

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

1122816 is an equidigital number, since it uses as much as digits as its factorization.

1122816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 65 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 1122816 is about 1059.6301241471. The cubic root of 1122816 is about 103.9368452858.

The spelling of 1122816 in words is "one million, one hundred twenty-two thousand, eight hundred sixteen".