1224000 has 168 divisors, whose sum is σ = 4636008. Its totient is φ = 307200.

The previous prime is 1223993. The next prime is 1224029. The reversal of 1224000 is 4221.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 1218816 = 72^2 + 1104^2 .

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

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, 71992 + ... + 72008.

2^1224000 is an apocalyptic number.

1224000 is a gapful number since it is divisible by the number (10) 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 1224000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2318004).

1224000 is an abundant number, since it is smaller than the sum of its proper divisors (3412008).

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

1224000 is a wasteful number, since it uses less digits than its factorization.

1224000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1224000 is about 1106.3453348751. The cubic root of 1224000 is about 106.9696248248.

Adding to 1224000 its reverse (4221), we get a palindrome (1228221).

The spelling of 1224000 in words is "one million, two hundred twenty-four thousand".