1222144 has 80 divisors (see below), whose sum is σ = 3142656. Its totient is φ = 460800.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222144 is 4412221.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39409 + ... + 39439.

2^1222144 is an apocalyptic number.

1222144 is a gapful number since it is divisible by the number (14) 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 1222144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571328).

1222144 is an abundant number, since it is smaller than the sum of its proper divisors (1920512).

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

1222144 is an equidigital number, since it uses as much as digits as its factorization.

1222144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 51 counting only the distinct ones).

The product of its digits is 128, while the sum is 16.

The square root of 1222144 is about 1105.5062188880. The cubic root of 1222144 is about 106.9155300379.

Adding to 1222144 its reverse (4412221), we get a palindrome (5634365).

The spelling of 1222144 in words is "one million, two hundred twenty-two thousand, one hundred forty-four".