1224545 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 824064.

The previous prime is 1224533. The next prime is 1224577. The reversal of 1224545 is 5454221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1224545 - 2⁴ = 1224529 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1224545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1769 + ... + 2361.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^1224545 is an apocalyptic number.

It is an amenable number.

1224545 is a deficient number, since it is larger than the sum of its proper divisors (486175).

1224545 is an equidigital number, since it uses as much as digits as its factorization.

1224545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 1600, while the sum is 23.

The square root of 1224545 is about 1106.5916139209. The cubic root of 1224545 is about 106.9854989520.

Adding to 1224545 its reverse (5454221), we get a palindrome (6678766).

The spelling of 1224545 in words is "one million, two hundred twenty-four thousand, five hundred forty-five".