1212822 has 48 divisors (see below), whose sum is σ = 2909088. Its totient is φ = 362880.

The previous prime is 1212817. The next prime is 1212839. The reversal of 1212822 is 2282121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1212795 and 1212804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16578 + ... + 16650.

It is an arithmetic number, because the mean of its divisors is an integer number (60606).

2^1212822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1454544).

1212822 is an abundant number, since it is smaller than the sum of its proper divisors (1696266).

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

1212822 is a wasteful number, since it uses less digits than its factorization.

1212822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 162 counting only the distinct ones).

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

The square root of 1212822 is about 1101.2819802394. The cubic root of 1212822 is about 106.6430003919.

Adding to 1212822 its reverse (2282121), we get a palindrome (3494943).

The spelling of 1212822 in words is "one million, two hundred twelve thousand, eight hundred twenty-two".