1224553 has 4 divisors (see below), whose sum is σ = 1335888. Its totient is φ = 1113220.

The previous prime is 1224533. The next prime is 1224577. The reversal of 1224553 is 3554221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55651 + ... + 55672.

It is an arithmetic number, because the mean of its divisors is an integer number (333972).

2^1224553 is an apocalyptic number.

1224553 is the 592-nd centered heptagonal number.

It is an amenable number.

1224553 is a deficient number, since it is larger than the sum of its proper divisors (111335).

1224553 is a wasteful number, since it uses less digits than its factorization.

1224553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111334.

The product of its digits is 1200, while the sum is 22.

The square root of 1224553 is about 1106.5952286179. The cubic root of 1224553 is about 106.9857319316.

Adding to 1224553 its reverse (3554221), we get a palindrome (4778774).

The spelling of 1224553 in words is "one million, two hundred twenty-four thousand, five hundred fifty-three".