1224653 has 4 divisors (see below), whose sum is σ = 1226940. Its totient is φ = 1222368.

The previous prime is 1224637. The next prime is 1224673. The reversal of 1224653 is 3564221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 619369 = 778^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224653 - 2⁴ = 1224637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224673) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 143 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (306735).

2^1224653 is an apocalyptic number.

It is an amenable number.

1224653 is a deficient number, since it is larger than the sum of its proper divisors (2287).

1224653 is an equidigital number, since it uses as much as digits as its factorization.

1224653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286.

The product of its digits is 1440, while the sum is 23.

The square root of 1224653 is about 1106.6404113351. The cubic root of 1224653 is about 106.9886440914.

Adding to 1224653 its reverse (3564221), we get a palindrome (4788874).

The spelling of 1224653 in words is "one million, two hundred twenty-four thousand, six hundred fifty-three".