1224428 has 12 divisors (see below), whose sum is σ = 2236080. Its totient is φ = 585552.

The previous prime is 1224413. The next prime is 1224437. The reversal of 1224428 is 8244221.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6563 + ... + 6746.

It is an arithmetic number, because the mean of its divisors is an integer number (186340).

2^1224428 is an apocalyptic number.

It is an amenable number.

1224428 is a deficient number, since it is larger than the sum of its proper divisors (1011652).

1224428 is a wasteful number, since it uses less digits than its factorization.

1224428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13336 (or 13334 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 1224428 is about 1106.5387476270. The cubic root of 1224428 is about 106.9820915089.

Adding to 1224428 its reverse (8244221), we get a palindrome (9468649).

The spelling of 1224428 in words is "one million, two hundred twenty-four thousand, four hundred twenty-eight".