1224605 has 8 divisors (see below), whose sum is σ = 1476792. Its totient is φ = 974848.

The previous prime is 1224599. The next prime is 1224637. The reversal of 1224605 is 5064221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 401956 + 822649 = 634^2 + 907^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224605 - 2¹⁸ = 962461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (184599).

2^1224605 is an apocalyptic number.

It is an amenable number.

1224605 is a deficient number, since it is larger than the sum of its proper divisors (252187).

1224605 is an equidigital number, since it uses as much as digits as its factorization.

1224605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1224605 is about 1106.6187238611. The cubic root of 1224605 is about 106.9872462745.

Adding to 1224605 its reverse (5064221), we get a palindrome (6288826).

The spelling of 1224605 in words is "one million, two hundred twenty-four thousand, six hundred five".