1022112 has 144 divisors (see below), whose sum is σ = 3689280. Its totient is φ = 269568.

The previous prime is 1022083. The next prime is 1022113. The reversal of 1022112 is 2112201.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1022094 and 1022103.

It is not an unprimeable number, because it can be changed into a prime (1022113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78618 + ... + 78630.

It is an arithmetic number, because the mean of its divisors is an integer number (25620).

2^1022112 is an apocalyptic number.

1022112 is a gapful number since it is divisible by the number (12) 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 1022112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1844640).

1022112 is an abundant number, since it is smaller than the sum of its proper divisors (2667168).

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

1022112 is a wasteful number, since it uses less digits than its factorization.

1022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1022112 is about 1010.9955489516. The cubic root of 1022112 is about 100.7316997632.

Adding to 1022112 its reverse (2112201), we get a palindrome (3134313).

It can be divided in two parts, 10 and 22112, that added together give a palindrome (22122).

The spelling of 1022112 in words is "one million, twenty-two thousand, one hundred twelve".