1228122 has 72 divisors (see below), whose sum is σ = 3328416. Its totient is φ = 332424.

The previous prime is 1228109. The next prime is 1228133. The reversal of 1228122 is 2218221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1228095 and 1228104.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64629 + ... + 64647.

It is an arithmetic number, because the mean of its divisors is an integer number (46228).

2^1228122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664208).

1228122 is an abundant number, since it is smaller than the sum of its proper divisors (2100294).

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

1228122 is an equidigital number, since it uses as much as digits as its factorization.

1228122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 31 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1228122 is about 1108.2066594277. The cubic root of 1228122 is about 107.0895689297.

Subtracting 1228122 from its reverse (2218221), we obtain a palindrome (990099).

The spelling of 1228122 in words is "one million, two hundred twenty-eight thousand, one hundred twenty-two".