1224020 has 36 divisors (see below), whose sum is σ = 2992500. Its totient is φ = 419328.

The previous prime is 1223993. The next prime is 1224029. The reversal of 1224020 is 204221.

It can be written as a sum of positive squares in 2 ways, for example, as 470596 + 753424 = 686^2 + 868^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1223992 and 1224010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (83125).

2^1224020 is an apocalyptic number.

1224020 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 1224020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496250).

1224020 is an abundant number, since it is smaller than the sum of its proper divisors (1768480).

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

1224020 is a wasteful number, since it uses less digits than its factorization.

1224020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1224020 is about 1106.3543736073. The cubic root of 1224020 is about 106.9702074448.

Adding to 1224020 its reverse (204221), we get a palindrome (1428241).

The spelling of 1224020 in words is "one million, two hundred twenty-four thousand, twenty".