1224557 has 4 divisors (see below), whose sum is σ = 1228380. Its totient is φ = 1220736.

The previous prime is 1224533. The next prime is 1224577. The reversal of 1224557 is 7554221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7554221 = 1999 ⋅3779.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 1012036 = 461^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224557 - 2¹⁰ = 1223533 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224577) 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, 1382 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (307095).

2^1224557 is an apocalyptic number.

It is an amenable number.

1224557 is a deficient number, since it is larger than the sum of its proper divisors (3823).

1224557 is an equidigital number, since it uses as much as digits as its factorization.

1224557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822.

The product of its digits is 2800, while the sum is 26.

The square root of 1224557 is about 1106.5970359621. The cubic root of 1224557 is about 106.9858484210.

Adding to 1224557 its reverse (7554221), we get a palindrome (8778778).

The spelling of 1224557 in words is "one million, two hundred twenty-four thousand, five hundred fifty-seven".